Leqi Direct Connection self-development
Six Major Difficulties, Kailing Handles Them All

  • Leqi native interfaces only provide "parts",Invoicing process, red-letter reversal, validation, format, invoice type, sandbox You have to figure it all out yourself
  • In-house development estimate 722 people/day, about 1.8 million Input, and also need to understand tax and bear business verification risks
  • Kailing Turnkey Project: Document processing, independent IP, visualized sandbox,Full source code delivery、long-term O&M
  • Server ownership belongs to you, source code copyright belongs to you,Independent and controllable, no third-party hosting, compliance without worry
Turnkey Project · Full-process agency service
One-stop delivery
1
Material FilingLeqi documentation preparation, filing, and coordination with the tax bureau
Kailing
2
Independent deploymentProcured server (ownership belongs to you) + fixed IP
Kailing
3
Sandbox testingVisualized sandbox environment · rapid integration testing
Kailing
4
Source code deliveryFull source code + copyright transfer
Attributed to Party A
5
Launch and operationsDedicated personnel and project-based operations and maintenance · Long-term support
Kailing
Party A only needs to cooperate with printing materials + stampingIndependent and controllable
6 Large
Leqi Direct Connection integration difficulties
180 ten thousand
Estimated in-house development investment, 722 person-days
Source code
Full delivery + copyright transfer
Turnkey
One-stop handling from materials to O&M

Building Leqi Direct Connection in-house is not as simple as imagined

Leqi only provides interface "parts"; business processes, reverse red-letter reversal, various verifications, layout encapsulation, and invoice type adaptation all have to be developed by enterprises themselves

Enterprise development teams struggle with self-developed Leqi integration Pain points
Interfaces pieced together until they crash, one wrong step and invoicing fails
Process, red-letter reversal, and verification all designed independently; wrong call sequence leads to direct failure
Turnkey delivery by Kailing's professional team Solution
Turnkey project, one-stop delivery
Materials, deployment, sandbox, source code, O&M—Kailing handles everything end to end
Visualized sandbox test environment Fast
Visualized sandbox, integration testing no longer rushed by time limits
Graphical sandbox testing environment, fast joint debugging and fast go-live
Headquarters of large enterprise groups Stable
Source code is yours, servers are yours
Independent and controllable, no third-party hosting, compliance that withstands scrutiny

What is the Leqi platform

The State Taxation Administration's "Smart Tax" innovation model, a one-stop service platform featuring tax-enterprise data interconnection and dual openness of "data + rules"

1
Leqi Platform

Through tax-enterprise data interconnection, it gradually evolves into data interoperability among government departments, between government and enterprises, and between enterprises, providing taxpayers and the government with one-stop service access, subscription, use, and supervision.

2
Direct Connection Entity

Owner of the direct connection platform, main responsible entity — head office, group headquarters, actual controlling entity with equity control relationships; interfaces with Leqi, supervises user entities, reports tax-related data, and bears data security responsibility.

3
User entity

Affiliated enterprises invited or authorized by the direct connection entity to use Leqi services; the direct connection entity may authorize affiliated enterprises or third-party enterprises to build and manage the platform.

One sentence: Leqi Direct Connection =Enterprises build their own invoicing channel directly connected to the tax bureau, the most capable and most autonomous, but also the one that most requires professional integration and operations.

Strongest Capabilities

With Direct Connection to Leqi, full capabilities including blue invoices and red invoices, credit limits, batch invoicing, and group reports are independently controllable, without relying on third-party platforms.

Data autonomy

Data resides in its own systems and own servers, meeting the high requirements of state-owned enterprises and large groups for data security and independent controllability.

Compliance Commitment

Complies with the State Taxation Administration's commitment that "Leqi-related systems do not use third-party hosting," with clear rights and responsibilities and legal compliance.

Leqi Direct Connection access conditions: first see if you qualify

Three thresholds—invoicing volume, amount, and industry—Kailing helps you verify eligibility, prepare materials, and coordinate with the tax bureau

Invoice volume conditions Meeting any one is sufficient

Issuance and receipt volumeDirect connection + user entity, before initiating access Cumulative invoicing volume and receiving volume over 12 months ≥ 10,000 invoices
Amount conditionIf less than 10,000 copies, then Invoicing amount ≥ 100 million yuan

Industry Special Approval Special-case special approval

Livelihood industriesFor livelihood-guarantee industries such as hospitals, thermal power, and public transportation, where revenue and invoice issuance/receipt volume do not meet the requirements, tax authorities mayAppropriately lower standards
Capability ApplicationApply for capabilities individually as much as possible; after application Must complete testing within 72 hours, otherwise the activation process must be restarted
Kailing agency qualification and filing: Verification of access conditions, Leqi document preparation, filing, and coordination and communication with relevant tax bureau departments are all handled by Kailing,Party A only needs to cooperate with printing materials + stamping and then complete the entire Leqi application process, saving worry and effort.

Direct Connection to Native Leqi Interface, Six Major Integration Difficulties

Leqi only provides interface capabilities; business logic, reverse processes, and verification risks are all borne by enterprises themselves

1 · Invoicing Process Design

All self-owned business systems are developed in-house, and Leqi only provides interface capabilities; reverse processes must be designed independently, and a single error in interface call sequence will cause invoicing failure.

2 · Red-flush process design

The full-chain reverse process of red-letter confirmation forms and reversals is complex, requiring self-designed handling of various exception branches.

3 · Various validation logics

Every parameter passed has validation and requires substantial development; business validation is not handled by Leqi (wrong tax number, code and tax rate mismatch, etc.), and risks are borne by the enterprise itself.

4 · Layout file packaging

The packaging rules for invoice layout files (PDF / OFD / XML) are cumbersome and need to be implemented and validated one by one.

5 · Invoice type development

The validation, format, process, and parameter passing differ for different invoice types and 20 types of specific-element invoices, making type-by-type development an enormous workload.

6 · Time-limited sandbox + business interface

Time-limited invoice sandbox testing is under great pressure; you also need to develop your own business interfaces for permissions, filling, approval, record statistics, delivery, group reports, etc.

In-house development or external procurement? The accounts make it clear

In-house development requires large investment, a long cycle, and self-borne risk; external procurement saves time and money, but full source code delivery and independent controllability must be required

Enterprise self-development High input

Build your own team, connect to Leqi yourself, and handle subsequent operations and maintenance
Estimated investmentApprox. 722 people/day, calculated at 2,500 yuan per person-day ≈ 1.8 million yuan
Hidden costsIt is necessary to understand taxation, bear business verification risks, work within sandbox time limits, and continuously invest in version updates

Entrust Kailing Recommended

Professional vendors go live with less time and lower cost
Core RequirementsFull source code delivery(service contracts/outsourced development), which enterprises can manage themselves with full autonomy and control
Compliance Bottom LineDoes not violate the State Taxation Administration"Leqi-related systems do not use third-party hosting"Commitment
Why choose external procurement + source code delivery: The overall investment in Leqi integration and subsequent operations and maintenance is large, and entrusting a professional vendor saves time and money; but the project Suppliers must be required to deliver the full source code, ensuring enterprises have self-management capability and true independent controllability — this is exactly how Kailing delivers.

Kailing Leqi Direct Connection · Five Major Advantages

From document submission to source code delivery, the entire process is compliant, turnkey, and independently controllable.

Materials for Filing on Behalf

Full package for Leqi material preparation, filing, and coordination and communication with the tax authority; the client only needs to cooperate with printing materials + stamping to complete the whole process.

Independent IP · Turnkey

Procured server (Alibaba Cloud/mainstream cloud, ownership belongs to Party A, Kailing only has usage rights), fixed IP filing, and one-stop deployment, launch, and operations.

Visualized sandbox

A graphical and visualized sandbox testing environment, convenient for joint debugging and fast to go live, avoiding repeated re-applications for time-limited sandboxes.

Source code delivery + copyright transfer

Full source code delivery with copyright transfer, clear ownership; Party A independently controls upgrades and secondary development, balancing flexibility and continuity.

Industry Experience Empowerment

Core members have over 5 years of business-finance-tax experience and Leqi Direct Connection practical cases; deeply integrated with SAP and ERP, supporting customized secondary development, and can be interviewed before signing.

Long-term dedicated operations and maintenance

After delivery, dedicated personnel are assigned for specialized O&M, continuously understanding the business and architecture; long-term support for system upgrades, version updates, and tax integration.

Professional and reliable delivery and service assurance

Every matter gets a response, every item gets resolved; reliable in both conduct and work

Private deployment
Independent deployment
Autonomous and controllable data, supporting internal and external network isolation
Source code
Full delivery
Copyright transfer, Party A has independent control
Level 3 of the Multi-Level Protection Scheme
Security and compliance
Cloud deployment has passed the Level 3 Multi-Level Protection Scheme assessment
Full-service
Service Support
On-site coordination, closed-loop tracking of issue events
Common Questions
What problems does Group Leqi Direct Connection solve?
Connect the "last mile" between the tax bureau and enterprise ERP, enabling all group entities to issue and collect fully digitalized e-invoices in a unified, compliant, and automated manner.
What advantages does it have compared with traditional invoicing methods?
Direct connection to the State Taxation Administration's Leqi channel, removing third-party invoicing intermediaries for faster invoicing, lower costs, and more controllable data.
Does it support multiple organizations and multiple tax numbers?
Supports unified management, centralized invoicing, and aggregation for multiple group organizations and multiple tax numbers.
What are the build cycle and integration method?
Provides standard interfaces and implementation services; launch is possible after completing Leqi qualification activation and ERP system joint debugging.

Leave the hard parts of Leqi Direct Connection to those who understand it best

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