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Kailing Technology's fully digitalized e-invoice Leqi Direct Connection solution helps group enterprises achieve business-finance-tax integration

Published: 2025-08-27 16:51

Under the tide of the comprehensive deepening of China Golden Tax Phase IV and the widespread adoption of fully digitalized e-invoices, group enterprises face severe challenges such as low invoicing efficiency, fragmented business-finance-tax data, and rising tax compliance risks. With deep insight into tax digitalization policies and rich practical experience, Kailing Technology launches a professional, efficient, and reliable enterprise fully digitalized Leqi Direct Connection solution to break down business, finance, and tax barriers for enterprises and build a new paradigm of integrated management.


I. Directly addressing pain points: the high threshold of self-built Leqi and the limitations of third-party solutions

For group enterprises, accessing the Leqi platform to achieve direct interconnection with the tax bureau system is key to improving invoicing efficiency, ensuring data security, and obtaining a VIP channel. However, connecting to the native Leqi interface presents significant difficulties:

1. Complex process design

Full-process logic such as invoicing, red-letter reversal, and delivery must be designed independently; incorrect interface calling sequence causes failure, and reverse process design is complex.

2. Massive validation logic

Interface parameter verification rules are numerous, development workload is large, and error prompts are unclear, with business logic risks borne entirely by the enterprise.

3. Layout file generation

Must self-synthesize PDF/OFD/XML layout files, and handling multi-line details is highly difficult to develop.

4. Multi-invoice type compatibility

Different invoice types require repeated process, validation, and layout development, resulting in a large workload.

5. Rigorous sandbox testing

All capability tests must be completed within 72 hours; if failed, reapplication is required, and the time pressure is enormous.

6. Operation Interface Development

Must self-develop a friendly and easy-to-use invoicing, management, and statistics interface and permission system.

Operation Interface Development


At the same time, enterprises' self-developed investment costs are high (estimated at the million level), and continuous investment in compatibility upgrades and operations and maintenance is required. Some third-party solutions on the market often only encapsulate basic interfaces, and the above core difficulties still need to be solved by enterprises themselves.


II. Kailing Solution: Full-Chain Empowerment to Overcome Leqi Direct Connection Challenges

Kailing Technology's fully digitalized e-invoice Leqi Direct Connection solution provides enterprises with one-stop services from Leqi access application to deep business-finance-tax integration, with core advantages standing out:

1.SelectableFull source code delivery, autonomous and controllable

On demandProvide the full source code of the "Fully Digitalized E-Invoice Management System" and complete the knowledge transfer.

Enterprises can operate and develop independently, or on demandConnectKailing operations and maintenance services completely avoid "third-party hosting" risks and achieve independent control of core capabilities.

2. Mature product engine, efficient integration

Built-in mature and stable invoicing process engine, automating the entire forward and reverse process (application, approval, invoicing, red-ink reversal, delivery), avoiding the risk of logic errors.

Prebuilt complete validation rule library covering interface parameters and core business logic (such as tax number and coding tax rate matching), greatly reducing development workload and compliance risks.

Powerful layout file engine, automatically and efficiently generating PDF/OFD/XML files that meet requirements, perfectly supporting complex invoice layouts.

Pre-compatibility for all invoice types, solving multi-type invoice issuance challenges in one go.

3. Rich Leqi experience, efficient implementation

Proficient in the Leqi access process and material preparation (information form, agreement, project report, IP proof, etc.).

A professional team helps enterprises efficiently pass sandbox testing, ensuring a successful 72-hour sprint.

Provides a simple and easy-to-use preset operation interface (invoicing application, approval, records, statistics, delivery, group reports, etc.), ready to use out of the box.

4. Deep business-finance integration, connecting the entire chain

The core value lies in seamlessly connecting enterprise business systems (such as SAP, Oracle, self-developed platforms) with the Leqi platform.

Output scenario: business order/contract data automatically triggers the invoicing process, finance reviews online, Leqi automatically issues invoices, and results are returned to the business system, realizing "invoice upon business generation." Automatically delivers PDF/OFD/XML to customers/sales staff, improving collection efficiency.

Input scenarios: automatic collection of input invoices from multiple channels such as email, scanning, and tax bureau synchronization, with intelligent OCR recognition, verification and duplicate checking, and compliance validation (seller blacklist, status monitoring, duplicate reimbursement, etc.). Automatic matching and write-off with purchase orders, with results returned to the financial system. Automatic synchronization of tax bureau data, monitoring of invoice red-flush/void status, and risk alerts. Support for precise selection and certification, achieving full input tax credit where due.

Electronic archiving: connect to the electronic accounting archives system, automatically match the XML original of fully digitalized e-invoices, meet the "original archiving" requirement, and completely avoid red-reversal risks.

5. Fully compatible with tax control/RPA/Leqi, smooth evolution

The solution supports enterprises' seamless switching and coexistence from traditional tax-control/RPA models to the Leqi platform, ensuring business continuity.

Kailing Solution: Full-Chain Empowerment to Overcome Leqi Direct Connection Challenges



III. Proven in practice: helping giant enterprises with business-finance-tax digital transformation

The Kailing solution has successfully served many industry-leading enterprises, empowering their business-finance-tax management upgrades:

1. Large manufacturing group

Scenario challenges: Dozens of subsidiaries and branches, numerous tax numbers, huge invoice issuance and receipt volume, low manual invoicing efficiency, disconnected business and finance systems, and heavy input VAT invoice verification workload.

Kailing Solution: Deploy a group-level output VAT invoice platform connected to the self-developed order system, automatically generating compliant invoice faces from business data, with Leqi Direct Connection for batch issuance and delivery; the input VAT invoice platform achieves automatic collection of all invoices, intelligent authenticity verification, automatic order matching, and risk monitoring.

Core results: invoicing efficiency increased by 80%, business-finance reconciliation manpower saved by 70%, tax compliance risks significantly reduced, and full group rollout completed within 3 months.

2. A leading nationwide property service provider

Scenario challenges: Over 200 tax numbers scattered across the country, property fee collection systems separated from invoicing, reliance on offline manual invoicing with low efficiency and high error rates; difficult management of massive scattered input VAT invoices.

Kailing Solution: The output VAT invoice platform is deeply integrated with the charging system, automatically splitting/merging to generate invoicing applications according to fee item rules, with Leqi automatically issuing and delivering electronic invoices; the mobile invoice folder + input VAT invoice platform enables convenient invoice collection for all employees, centralized management, and automated verification and write-off.

Core results: realizing "invoicing upon business occurrence," zeroing out the frontline invoicing burden, increasing invoice processing efficiency by 90%, and making input VAT deduction more timely and accurate.

3. Internationally renowned consumer goods enterprise

Scenario challenges: Large volume of reimbursements and corporate payments, chaotic electronic invoice management, risks of duplicate reimbursement and compliance, and invoice review consuming significant manpower.

Kailing Solution: Deploy an intelligent invoice review OCR platform and electronic accounting archives system to achieve full-process automated collection, authenticity verification and duplicate checking, compliance review, and electronic archiving of reimbursement invoices, with deep integration with expense control systems.

Core results: reimbursement review efficiency increased 15 times, electronic invoices achieved 100% paperless circulation and secure archiving, and financial shared service center manpower optimized by over 50%.



In the era of deep integration between China Golden Tax Phase IV and fully digitalized e-invoices, Kailing Technology's fully digitalized e-invoice Leqi Direct Connection solution not only solves the technical difficulties of Leqi integration, but also helps group enterprises reduce costs, improve efficiency, and upgrade compliance through business-finance-tax data connectivity, full risk control, and full-cycle services.

Choose Kailing Technology, and group enterprises can quickly achieve business-finance-tax digital transformation without investing substantial resources, truly turning fully digitalized e-invoices into the core driver of business-finance-tax integrationhttps://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.

Internationally renowned consumer goods enterprise




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Common Questions
What are the difficulties for group enterprises in developing their own Leqi interface?
The difficulties of in-house Leqi interfaces include: complex process design (logic for invoicing, red-letter reversal, delivery, etc. is error-prone), massive validation logic (large development workload with unclear error prompts), layout file generation (PDF/OFD/XML composition is highly difficult), multi-invoice type compatibility requiring repeated development, strict sandbox testing (completed within 72 hours, failure requires reapplication), and the need to develop operation interfaces and permission systems in-house. The investment cost is estimated at the million-yuan level, with ongoing operations and maintenance required.
How does Kailing Technology's fully digitalized e-invoice Leqi solution lower the Leqi connection threshold?
The Kailing solution provides full source code delivery, allowing enterprises to operate and maintain it independently; it includes a mature invoicing process engine, validation rule library, and layout file engine, pre-compatible with all invoice types; a professional team assists with Leqi Direct Connection access and sandbox testing (72-hour sprint); and it provides an out-of-the-box operation interface. The core is deep integration with enterprise business systems (such as SAP and Oracle), achieving business-finance-tax data connectivity and supporting smooth switching among tax control/RPA/Leqi Direct Connection.
How does the Kailing solution achieve business-finance-tax integration?
Output scenario: business orders automatically trigger invoicing, finance reviews online, Leqi automatically issues invoices and returns results, realizing "invoice upon business generation." Input scenario: automatically collects invoices from multiple channels, with OCR recognition, authenticity verification and duplicate checking, compliance validation, automatic matching and write-off with purchase orders, and synchronized tax bureau data for risk monitoring. Electronic archiving: connects to the electronic accounting archives system, automatically matches fully digitalized e-invoice XML originals, and meets the "original archive" requirement.
How effective is the Kailing solution in a large manufacturing group?
A certain large manufacturing group has dozens of subsidiaries and branches, with large invoice issuance and receipt volumes and fragmented business-finance-tax systems. Kailing deployed a group-level output VAT platform connected to the self-developed order system, achieving automatic generation of invoice details from business data and batch invoicing and delivery via Leqi Direct Connection; the input VAT platform achieved automatic collection of all invoices, intelligent authenticity verification, order matching, and risk monitoring. Results: invoicing efficiency increased by 80%, business-finance reconciliation manpower saved by 70%, and the entire group went live within 3 months.
How does the Kailing solution address the invoicing challenges of property management companies with dispersed tax numbers?
A certain national property management leader has more than 200 tax numbers scattered across different places, with its charging system separated from invoicing. The Kailing output VAT invoice platform deeply integrates with the charging system, automatically splits/merges to generate invoicing applications according to fee item rules, and Leqi automatically issues and delivers electronic invoices; the mobile invoice folder + input VAT invoice platform enables all-staff invoice collection, centralized management, and automated write-off verification. Results: achieved "invoicing as soon as business occurs," eliminated the frontline invoicing burden, and improved invoice processing efficiency by 90%.
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