Reduce costs and increase efficiency: how Kailing Technology's Leqi interface solution helps enterprises save 90% of development costs

With the full implementation of China Golden Tax Phase IV, the era of fully digitalized e-invoices has officially arrived. The "Leqi" platform launched by the State Taxation Administration provides enterprises with digital invoice services directly connected to the tax system, enabling 365×24 uninterrupted invoicing, automatic delivery, and real-time data synchronization. However, for most enterprises, directly connecting to the native Leqi interface not only has high technical thresholds and long development cycles, but also faces a series of challenges such as complex process design, cumbersome validation logic, difficult layout file composition, and strict sandbox testing.

I. In-house Leqi integration: high cost, high risk, low efficiency

According to official materials, if an enterprise chooses to develop the Leqi Direct Connection interface itself, it needs to complete the following core tasks:

Process design:The entire process of blue invoices, red invoices, certification and deduction, confirmation forms, etc. must be sorted out independently, and reverse processes (such as red offset and revocation) are especially complex;

Rule validation:Blue invoice issuance involves 52 rules, and red invoices as many as 142, and the Leqi interface only returns "success/failure" without indicating the specific error reason;

Layout file generation:Must self-synthesize three formats: PDF, OFD, and XML, with poor scalability for multi-line details and special industry templates;

Multi-invoice type adaptation:The parameter logic differs for different invoice types, and each new invoice type added requires redevelopment;

High pressure of sandbox testing:All capability tests must be completed within 72 hours; if failed, materials must be resubmitted, and the cycle is uncontrollable;

Operation Interface Development:Front-end functions such as permission management, invoicing approval, statistical reports, and delivery notifications must be built from scratch.

It is estimated that if an enterprise develops the Leqi interface on its own, the basic development investment alone may exceed one million yuan, and each subsequent interface upgrade or policy change requires additional manpower and time costs, keeping overall operation and maintenance costs high.

More critically, enterprises also need to bear tax compliance risks caused by process errors and data anomalies—and these risks, under the Leqi model, are borne jointly and severally by the directly connected unit.

II. Kailing Technology's solution: encapsulated interfaces + mature products for "ready-to-use" deployment

Facing the above pain points, Kailing Technology proposes a "standardized + configurable + private deployment" Leqi integration solution, with core advantages reflected in the following aspects:

1. Full-process presetting, no repetitionDevelopment

The Kailing system has built-in complete business processes including blue invoice issuance, red confirmation form application/confirmation/cancellation, invoice delivery, input collection, selection and certification, and status monitoring, so enterprises do not need to design logic or develop pages themselves. After launch, operations can be performed through a visual interface, with all process nodes clearly traceable.

2. Intelligent verification and precise error reporting

The system has built-in 500+ validation rules for commodity codes, tax rate matching, customer information, and invoicing limits, and provides real-time prompts on the front end for specific error causes, greatly reducing trial-and-error costs and manual intervention.

3. Self-developed layout engine, one-click generation of invoices in three formats

Through self-developed layout file composition technology, it automatically outputs PDF, OFD, and XML files compliant with tax bureau specifications, supports complex scenarios such as multi-line details, merging and splitting, and remark concatenation, and adapts to seamless upgrades for future new invoice types.

4. Private deployment + full source code delivery

Strictly comply with the State Taxation Administration's requirement that "the Leqi system must not be hosted by a third party." All systems are deployed locally, and data never leaves the intranet. Enterprises can operate and maintain the systems independently or entrust Kailing to provide on-demand services,SelectableFull source code deliveryMode, completing knowledge transfer and truly achieving "independent and controllable" operations.

5. Fast integration with existing business systems

The solution has successfully integrated with multiple systems such as SAP, Oracle, Yonyou NC, Weaver OA, and self-developed ERP, supporting multiple integration methods such as APIs, database intermediate tables, and message queues, connecting the full chain of contract-order-invoicing-payment collection-archiving.

III. Verified by real cases: launched in 3 months, saving millions in costs

A certain large manufacturing group case:The group originally hadNearly 50subsidiaries adopted a decentralized invoicing model, resulting in low work efficiency. By introducing the Kailing Leqi solution, with an investment equivalent to only 10% of self-development cost, it achieved unified invoicing management across the entire group within 2 months, increased invoicing efficiency by 80%, and reduced labor costs by 50%.

Case of a well-known property services enterprise:This enterprise has 280+individual income tax numbers, traditional invoicing methods struggle to meet business needs. After adopting the Kailing solution, it not only achieved automatic invoicing based on business contracts, but also established a complete input and output VAT invoice management platform, saving approximately 2 million yuan in development investment and completing nationwide rollout within 90 days.

Case of a high-tech internet enterprise:This enterprise has a complex business system, with 30+individual income tax numbers and 5 business lines. Kailing Technology completed rapid implementation in 2 months, connecting the business system with the Leqi platform to achieve automated invoicing processing, with an estimated comprehensive cost savings of over 3 million yuan within three years.

Leqi is not a simple technical connection, but key infrastructure for enterprise business-finance-tax digital transformation. Rather than investing a large amount of manpower and resources to "build a car from scratch," it is better to use standardized products from mature vendors for rapid implementation.

Kailing Technology with compliance assurance、Efficiency improvement、Management optimization、Decision supportofService model, which not only helps enterprises save more than 90% of development costs, but also avoids policy compliance risks and accelerates the business-finance-tax integration process.

With senior industry experience, mature software products, and a professional service team, Kailing Technology is helping more and more enterprises smoothly complete business-finance-tax digital transformation and upgrading, gaining an edge in fierce market competition.：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.