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Leqi Direct Connection access conditions? Kailing Technology provides in-depth, professional interpretation of the Leqi difficulties and doubts troubling enterprises

Published: 2025-06-09 17:26

Against the backdrop of China Golden Tax Phase IV and the era of fully digitalized e-invoices, tax digital management transformation has become an inevitable path for enterprises. As an important platform launched by the State Taxation Administration to achieve direct connection between the tax system and enterprises' own information systems and provide enterprises with fully digitalized e-invoices and other tax-related services, the Leqi platform has attracted widespread attention from enterprises. However, when facing Leqi Direct Connection access, enterprises often have many questions and concerns. Today, Kailing Technology will provide an in-depth analysis of the conditions for Leqi Direct Connection access and the difficult and doubtful points that trouble enterprises.

Leqi Direct Connection access conditions? Kailing Technology provides in-depth, professional interpretation of the Leqi difficulties and doubts troubling enterprises


I. Interpretation of Leqi Direct Connection access conditions

(1) Basic conditions

1. Tax credit conditions:The direct connection entity and its filed user entities must have a tax credit rating of A or B in the previous year, with no major tax violations in the past 3 years and no major tax-related public opinion incidents. Good tax credit is not only the cornerstone of enterprise tax management but also one of the key considerations for tax authorities in reviewing direct connection access. This reflects the tax authorities' strict requirements for enterprise tax compliance; only enterprises that steadily maintain a high tax credit level are eligible to enjoy the convenient services brought by Leqi Direct Connection.

2. Operating revenue conditions:The direct connection entity and its filed user entities have a total operating revenue of over 50 million yuan in the previous year. This condition restricts from the perspective of enterprise operating scale, ensuring that enterprises accessing the Leqi Platform have certain economic strength and business activity, can effectively utilize the tax-related service functions of the Leqi Platform, promote the standardized development of their own business, and also provide a relatively stable foundation for tax authorities' tax collection and management work.

3. Time + invoice volume conditions:In the 12 months before the direct connection entity and its filed user entities apply for access, the cumulative invoice issuance and receipt volume must be no less than 10,000 invoices. This requirement focuses on the enterprise's daily invoice business volume. As important vouchers of enterprise economic activities, a higher invoice volume means a higher frequency of transactions. After accessing the Leqi Platform, digital invoice management can be better achieved, improving enterprise tax work efficiency and also helping tax authorities centrally manage enterprise tax data.

4. Time + amount conditions:In the 12 months before the direct connection entity and its filed user entities apply for access, the cumulative invoicing amount must be no less than 100 million yuan. This supplementary condition further comprehensively considers the enterprise's business scale and transaction amount, providing another way to meet access conditions for enterprises with fewer invoices but larger single transaction amounts, enabling more different types of enterprises to have the opportunity to be included in the Leqi Platform service system, fully reflecting the flexibility and inclusiveness of the Leqi policy.

Specific details are subject to notices from each province; old version requirements:The combined invoice issuance volume and invoice receipt volume of this enterprise and enterprises simultaneously requesting to become its user units in the 12 months prior to the month of initiating the access request is no less than 50,000 invoices, or the combined invoice issuance and receipt volume is less than 50,000 invoices but the invoiced amount is no less than RMB 500 million.)

5. Cooperate with tax authorities in providing materials:The direct connection entity shall provide relevant tax-related data of the direct connection entity and user entities as required by tax authorities, including but not limited to the operator identity, operating income, goods flow, and capital flow of user entities. This indicates that enterprises must have good data collection, organization, and reporting capabilities in tax management and actively cooperate with tax authorities' regulatory work. This is the basic prerequisite for Leqi Direct Connection access, helping tax authorities fully understand enterprises' operating conditions and tax risk situations, and providing precise tax services and management for enterprises.


Interpretation of Leqi Direct Connection access conditions

Interpretation of Leqi Direct Connection access conditions


(II) Special Approval for Special Industries

For industries safeguarding people's livelihood such as hospitals, education, water, gas, heat and electricity, and public transportation, as well as large state-owned enterprises, public institutions and enterprises, and industry associations applying to connect to the Leqi platform, the Beijing Municipal Tax Service, State Taxation Administration may adjust access conditions according to specific circumstances. This policy tilt fully takes into account the particularity of livelihood-guarantee industries and specific types of units. These units play an indispensable role in social and economic development. Although their operating characteristics may differ from ordinary commercial enterprises, connecting to the Leqi platform can likewise improve the informatization level of their tax management and safeguard the healthy and stable development of the industry, while also reflecting the tax authorities' humanized and differentiated principles in policy implementation.


(3) Technical/security conditions

1. Compliance, legality and liability:The direct connection entity shall, in accordance with the Cybersecurity Law of the People's Republic of China, the Data Security Law of the People's Republic of China, the Personal Information Protection Law of the People's Republic of China, and other relevant laws and regulations, implement the cybersecurity multi-level protection system, assume the cybersecurity protection responsibility of the direct connection platform, and ensure the safe and stable operation of the direct connection platform. Enterprises must comply with cybersecurity, data security, and other relevant regulations, follow the management requirements of tax authorities, truthfully report major changes and user entity situations to tax authorities, and bear joint liability for serious consequences caused by user entities' illegal and non-compliant acts. In today's digital era, network and data security are crucial. Tax authorities impose clear requirements on the technical and security management capabilities of enterprises accessing the Leqi Platform, aiming to ensure the security and confidentiality of tax-related data, prevent data leakage, tampering, and other security incidents, and maintain the stability of tax collection and management order. Enterprises must establish a sound security management system, possess corresponding technical protection measures to meet compliance requirements, and bear corresponding legal responsibilities for possible security issues.

2. Professional capabilities and relevant authorizations:The direct connection entity must possess professional informatization construction, service, operation and maintenance, and security capabilities, and have software copyright, use rights, or relevant authorization for the self-owned information system intended to access the Leqi Platform. Direct connection access to the Leqi Platform involves complex informatization system integration and interfacing work, requiring enterprises to have professional technical teams and mature technical architectures that can ensure stable operation and continuous optimization of the system. At the same time, the requirements for information system-related rights ensure enterprises' technical autonomy and legality, facilitating enterprises to carry out personalized development and customization according to their own business needs under the framework of the Leqi Platform, achieving deep integration of tax management and enterprise overall informatization construction.


II. Analysis of Leqi Direct Connection integration difficulties

(1) Process Design

Leqi only provides some core interface capabilities, and enterprises need to develop all their own business systems according to their own invoicing logic, especially all reverse processes. If the order of interface calls is wrong, it will directly cause invoicing failure. This requires enterprises, when designing processes, to have an in-depth understanding and precise grasp of their own business processes and tax management requirements, and also to arrange professional technical personnel to carefully connect and jointly test the Leqi interfaces and internal enterprise systems, ensuring smooth processes at every stage. For enterprises lacking rich informatization construction experience and professional tax management knowledge, this is an extremely challenging task.


(II) Verification logic

Every invoicing data parameter passed has strict validation logic, requiring enterprises to invest substantial manpower and time in corresponding development work. However, the Leqi interface returns only two simple results for parameter logic errors—success and failure—without specifying the exact cause of the error, which increases the difficulty for enterprises to troubleshoot problems. In addition, the Leqi interface performs no validation for business-generated validation logic, so risks such as an incorrect invoicing party tax number or a mismatch between tax code and tax rate must be borne by the enterprise itself. When developing invoicing data validation logic, enterprises must not only follow the Leqi interface specifications but also combine their own business rules and tax policy requirements to establish a comprehensive and detailed validation system, ensuring the accuracy and compliance of invoicing data and avoiding tax risks and invoicing failures caused by data errors—this places very high demands on an enterprise's technical strength and tax expertise.


(3) Layout file composition

After invoice issuance is completed, Leqi only returns a success or failure result for the upload. Enterprises need to use the serial number to call the "Upload Result Query API" to confirm whether the issuance was successful, and the PDF/OFD/XML layout files at the preview layer need to be synthesized by the enterprise itself. Enterprises must develop their own methods for constructing the corresponding layout files. For example, when handling complex situations such as multi-line invoice details, achieving accurate generation and compliant display of layout files is technically difficult. If enterprises choose layout file templates from the tax authority, they will face the problem of low scalability, making it difficult to meet diverse business needs and invoice issuance scenarios, which to a certain extent limits enterprise flexibility and innovation capability in invoice management, and also increases the technical burden and cost investment in layout file processing.


(4) Differences in invoice types

When connecting to the Leqi platform, different invoice types differ significantly in validation logic, format, and process parameter passing. Enterprises need to re-sort the corresponding integration process and development work for each invoice type, which means that during Leqi Direct Connection access, enterprises face complex technical requirements and business rules for multiple invoice types and must carry out a large amount of repetitive development and testing, greatly increasing project time and labor costs. This is a severe test of an enterprise's technical team and project management capabilities, and it is also prone to causing various problems and risks due to improper handling of differences between invoice types.


(5) Sandbox testing

Within 72 hours after sandbox testing begins, the enterprise must complete all testing work for the activated capabilities; otherwise, it will face the dilemma of resubmitting application materials and waiting for Leqi review approval before restarting testing. This strict time limit requires enterprises to have efficient and rigorous test organization and execution capabilities during the sandbox testing phase. They need to formulate a complete test plan in advance, reasonably arrange test resources, and conduct comprehensive and detailed testing of all functions and business processes to ensure that all potential issues are discovered and resolved within the specified time and that testing is completed smoothly. This not only tests the enterprise's technical strength but also places high demands on its project management efficiency and emergency response capabilities. Once a problem occurs during testing and cannot be resolved in time, it will seriously affect the overall project progress and launch time.


(6) Operation interface development

Enterprises need to independently develop and design an operation interface with a concise page and high usability, covering multiple functional modules such as permission management, invoice issuance, approval invoicing, invoicing record statistics, invoice delivery, and group reports. A good operation interface is a key factor in improving user experience and work efficiency, but developing an operation interface that meets an enterprise's own business needs and user habits requires the enterprise to have a professional UI/UX design team and rich software development experience, deeply understand the enterprise's internal tax management processes and user operation scenarios, and conduct repeated requirement research, design optimization, and user testing to ensure the interface's intuitiveness, usability, and efficiency. For many enterprises that focus on core business operations and lack professional software development and design capabilities, this is an arduous task.


Analysis of Leqi Direct Connection integration difficulties


III. Kailing Technology——Your Leqi Direct Connection Access Expert

Facing the many difficulties and doubts of Leqi Direct Connection access, Kailing Technology, with its deep professional accumulation and rich practical experience in the business-finance-tax digitalization solutions field, provides enterprises with comprehensive, one-stop services, helping enterprises easily cope with Leqi Direct Connection access challenges and enjoy the many benefits brought by tax digitalization management.


(1) Professional technical team and mature solutions

Kailing TechnologyExpert TeamHas an in-depth understanding and precise grasp of the Leqi platform's architecture, interface specifications, business processes and tax policies and regulations. Based on rich project practice, Kailing Technology has built a mature, stable, efficient Leqi Direct Connection solution that fits enterprises' actual business needs, and can provide professional and precise solutions for various technical difficulties encountered by enterprises during access, such as process design, validation logic, format file composition, invoice type differences and sandbox testing, ensuring that enterprises' Leqi Direct Connection access work advances smoothly and goes live successfully on the first attempt, saving substantial time and effort costs.


(II) In-Depth Process Optimization and Knowledge Transfer

In Leqi Direct Connection access projects, through close collaboration with enterprise teams, Kailing TechnologyTeamTransfer Leqi-related process design knowledge and practical experience to the enterprise's internal technical and management personnel, helping the enterprise establish a complete Leqi operation management system, so that after project launch the enterprise can independently carry out daily system operation and maintenance and process optimization, achieve seamless integration and continuous improvement between the Leqi platform and the enterprise's internal business systems, continuously improve the enterprise's tax management efficiency and digitalization level, and create long-term stable business value for the enterprise.


(3) Full-process on-site service and considerate after-sales support

Kailing Technology is well aware of the importance and urgency of Leqi Direct Connection access projects for enterprises, and therefore provides a full-process on-site service model. During project implementation, Kailing Technology's project managers, technical engineers and implementation consultants and other professionals will be stationed at the enterprise site, conducting face-to-face in-depth communication and collaboration with the enterprise's business team, finance team and IT team, promptly responding to and resolving various issues and emergencies encountered by the enterprise during project advancement, ensuring the project is implemented smoothly as planned.


(4) Proven by success stories and industry reputation

Kailing Technology has successfully provided Leqi Direct Connection access services to leading enterprises in many industries, accumulating rich industry cases and a good customer reputation. From large manufacturing enterprises and financial and insurance institutions to well-known internet companies and chain commercial groups, Kailing Technology, with its professional technical strength, high-quality service, and efficient project delivery capabilities, has helped many enterprises achieve digital transformation and upgrading of tax management, significantly improving their invoice management efficiency, tax risk prevention and control capabilities, and overall business-finance-tax management level, creating significant economic and management benefits for customers.


(5) Full source code delivery and autonomous and controllable assurance

Kailing Technology is committed to providing customers with independently controllable Leqi Direct Connection solutions. During project delivery, it will deliver all Leqi integration-related source code to the enterprise and assist the enterprise in completing knowledge transfer on the use of the source code. This means that after the project goes live, the enterprise will fully possess the autonomous management right and control right over the Leqi platform integration system, and can carry out system function expansion, performance optimization, and secondary development at any time according to its own business development changes and market needs, without relying on external suppliers. This effectively avoids various risks and constraints that may arise from technical dependence, truly achieving autonomous control and sustainable development of the enterprise's tax management information system, and laying a solid technical foundation for the enterprise's long-term development in the digital era.


Kailing Technology——Your Leqi Direct Connection Access Expert


In today's digital development, Leqi Direct Connection access involves certain requirements and challenges. If enterprises join hands with professional business-finance-tax digital solution service providers, they can overcome the related difficulties, successfully complete access, and achieve an upgrade in tax digital management. Kailing Technology upholds a professional, efficient, and reliable service philosophy, providing enterprises with comprehensive technical support and service guarantees to help them seize opportunities in the era of China Golden Tax Phase IV and fully digitalized e-invoices, enhance competitiveness, and move toward high-quality development.

If you have questions or needs regarding Leqi Direct Connection access,Welcome andKailing TechnologyGet in touch:https://www.kailingteck.com/h-col-123.html




As a comprehensive business-finance-tax digitalization solution service provider, Kailing Technology provides business-finance-tax management digital transformation products and operational services for various government agencies, institutions, and large, medium, and small enterprises. The product line includes:

Solutions for sales contract management system, procurement contract management system, fully digitalized Leqi interface project, automatic output VAT invoicing system, invoice issuance for individuals system, employee expense control and reimbursement system, input VAT invoice management system, supply chain collaborative reconciliation system, imaging OCR recognition system, automatic financial bookkeeping system, electronic accounting archives system and other businesses, comprehensively advancing the digitalization process across various fields.

If you have any business-finance-tax digital transformation needs, welcome to contact us. Beijing Kailing Technology will serve you wholeheartedly.

Kailing Technology——Your Leqi Direct Connection Access Expert


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Common Questions
What basic conditions must be met for Leqi Direct Connection access?
The following must be met: tax credit rating A/B and no major tax violations in the past 3 years; total operating revenue of ≥50 million yuan in the previous year; cumulative invoicing and receiving volume of ≥10,000 in the 12 months before application; cumulative invoicing amount of ≥100 million yuan. At the same time, relevant tax data must be provided.
What are the main difficulties of Leqi Direct Connection integration?
Difficulties include: process design requiring independent development of reverse processes; strict validation logic with error return values limited to success/failure; layout files requiring self-built synthesis; large differences among invoice types requiring separate development; sandbox testing requiring completion within 72 hours; and operation interfaces requiring self-building.
How does Kailing Technology help enterprises solve Leqi Direct Connection challenges?
Kailing Technology provides a professional technical team and mature solutions, covering process design, verification logic and layout composition; through in-depth process optimization and knowledge transfer, it helps enterprises operate independently; it provides full on-site services; and it delivers the full source code to ensure independent controllability.
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