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No self-development required, rapid compliance: Kailing Technology provides enterprises with Leqi platform application guidance and high-availability technical integration services

Published: 2026-04-20 17:36

"China Golden Tax Phase IV" has been fully implemented, and the era of "fully digitalized e-invoices" has arrived. For group enterprises, connecting to the "Leqi Platform" of the State Taxation Administration to achieve integrated business-finance-tax fusion is no longer a "multiple-choice question", but a "mandatory question".

But a real challenge lies ahead:If enterprises develop their own integration with Leqi, the investment is huge, the cycle is long, and risks are hard to control; if they do not connect, they fear falling behind in compliance and efficiency.

Don't worry. Kailing Technology is here precisely to solve this dilemma.

I. Leqi Direct Connection: the opportunity is good, but self-development has many "pitfalls"

The Leqi Platform (Natural System) is a tax-enterprise direct connection channel opened by the State Taxation Administration to qualifying enterprises. Once successfully connected, enterprises can achieve:

Invoice upon business occurrence, deliver upon invoicing, and collect payment upon delivery

Automatic invoice issuance, automatic push, automatic archiving

Automatic verification, automatic certification, automatic deduction of input VAT invoices

But ideals are plump, while reality is rather bony.

According to our experience coaching hundreds of enterprises, enterprises developing in-house Leqi integration typically encounter the following "hidden pitfalls":

Complex process design: Invoicing, red-letter reversal, voiding, verification... each step has a strict call sequence, and one wrong step causes failure.

Error messages are unclear: the Leqi API only returns "success/failure" and does not tell you where the error is, so troubleshooting relies entirely on guessing.

Layout files need to be self-built: Leqi only returns XML data; PDF and OFD preview files must be synthesized by the enterprise itself.

Extremely short sandbox testing time: All tests must be completed within 72 hours after the capability is activated, otherwise everything must start over.

The business interface must be self-developed: Invoice filling, approval, records, reports... all require the enterprise to develop its own system.

What is more realistic is:For enterprises to self-develop a usable Leqi integration system, they not only need to build a technical team with high salaries but also invest several months or even a year, and subsequently bear transformation costs for every policy upgrade.

One-sentence summary: doing it yourself is too heavy, too slow, and too expensive.

Leqi Direct Connection: Good opportunity, but self-development has many "pitfalls"

II. Kailing Technology: turning Leqi integration into a "turnkey project"

We don't sell concepts; we deliver results.

Kailing Technology provides fromLeqi application coaching → system deployment → sandbox testing → official launch → continuous operations and maintenance's one-stop service.Enterprises only need to cooperate by printing materials and affixing seals; leave everything else to us.

Our core advantages:

✅ Advantage 1: Full-process guidance for Leqi application, "zero hassle" for enterprises

Assist in writing all application materials

Assist with communication and coordination with the tax bureau

Enterprises only need to cooperate by affixing seals to complete the entire application process

✅ Advantage 2: Compliant "turnkey" project, clear asset ownership

Servers can be deployed on mainstream platforms such as AWS and Alibaba Cloud,Ownership belongs to the enterprise

Kailing only enjoys the right of use and is responsible for deployment, operations and maintenance, and upgrades

Provides an independent fixed IP to meet tax bureau security requirements

✅ Advantage 3: Visual sandbox testing, 72-hour rapid clearance

Provides a graphical testing interface, requiring no command-line debugging

Supports testing individual capabilities one by one, avoiding "one error returning all results"

Significantly lower testing thresholds and improve pass rates

✅ Advantage 4: Full source code delivery, enterprise autonomy and controllability

At project delivery, according to the agreement requirementsFull source code provided

Synchronously complete the transfer of software copyright

Enterprises can manage independently and conduct secondary development, completely eliminating technology lock-in

✅ Advantage 5: Rich industry experience, committed response

Core team members have 5+ years of business-finance-tax + IT experience

Questions responded to within 10 minutes, general questions closed the same day

For policy changes (such as new invoice types), compatibility upgrades completed within 5 working days

Our core advantages:

III.Not just technical integration, but the realization of business value

We don't just talk about interfaces and protocols. We care more about:What exactly can this system bring to your company?

For finance leaders:

Output side: invoice issued as soon as business occurs → customers pay faster → collection cycle shortened

Input side: Employees can collect invoices by taking photos or scanning codes → automatic authenticity verification, duplicate checking and compliance checks → finance no longer works overtime matching invoices

Bookkeeping side: Invoice system connected with ERP/OA → automatic voucher generation → automatic electronic archive filing

For IT leaders:

No self-development required, reducing technical debt

Private deployment + source code delivery, fully autonomous and controllable

Kailing is responsible for operations and maintenance, allowing the IT team to focus on core business

For enterprise decision-makers:

Compliance: meet China Golden Tax Phase IV and Archives Bureau requirements

Efficient: full-process automation of invoicing, invoice receipt, bookkeeping, and archiving

Reduce costs: save labor costs for invoicing clerks, verification clerks, archive administrators, etc.

China Golden Tax Phase IV is not a passing trend, but a profound transformation of business-finance-tax infrastructure. Leqi Direct Connection is the most efficient and most compliant channel for large enterprises in this transformation. But developing from scratch yourself is truly unnecessary. Leave professional matters to a professional team, and your team can focus more on business and respond to the market faster. Kailing Technology is willing to be your most reliable companion on the path of business-finance-tax digitalization.

If you are considering Leqi Direct Connection, or have already applied but encountered technical bottlenecks, you are welcome to contact Kailing Technology at any time: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 businesses including sales contract management system, procurement contract management system, fully digitalized Leqi interface project, output automatic invoicing system, reverse invoicing system, invoice issuance for individuals system, employee expense control and reimbursement system, input VAT invoice management system, supply chain collaborative reconciliation system, image OCR recognition system, automatic financial bookkeeping system, and electronic accounting archives system, comprehensively driving 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.

For enterprise decision-makers:

#Leqi Direct Connection #Fully Digitalized Leqi Solution #Leqi Interface #Fully Digitalized E-Invoice #Leqi Integration #Digital Business-Finance-Tax #China Golden Tax Phase IV #Business-Finance-Tax Integration


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Common Questions
What pitfalls will enterprises encounter when developing their own integration with the Leqi platform?
Common problems in in-house Leqi integration include: complex process design (strict call order for invoicing, red-letter reversal, and other steps), unclear error information (only success/failure returned), need to build layout files independently (PDF/OFD), sandbox testing time of only 72 hours, and business interfaces requiring in-house development. The investment is large, the cycle is long, and the risk is high, and subsequent policy upgrades also require modification costs.
What exactly does Kailing Technology's Leqi Direct Connection service include?
Kailing provides one-stop services from Leqi application guidance, system deployment, and sandbox testing to official launch and ongoing operations and maintenance. Enterprises only need to cooperate with stamping; Kailing handles the rest. Advantages include: full-process application guidance, compliance turnkey project (servers can be deployed on AWS/Alibaba Cloud, with ownership belonging to the enterprise), visual sandbox testing passing within 72 hours, full source code delivery, a team with over 5 years of business-finance-tax IT experience, and responses to issues within 10 minutes.
What practical value can Kailing Technology's Leqi solution bring to finance and IT leaders?
For finance: output VAT business is invoiced as soon as it occurs, shortening the collection cycle; input VAT is automatically collected, verified, and checked for duplicates when employees take photos; on the bookkeeping side, invoices are connected with ERP/OA, vouchers are automatically generated, and electronic archives are automatically filed. For IT: no in-house development is needed, reducing technical debt; private deployment + source code delivery ensures independent control; Kailing handles operations and maintenance, allowing IT to focus on core business.
Does Kailing Technology provide source code delivery? What are the benefits?
Yes. At project delivery, the full source code can be provided according to the agreement, and the software copyright transfer can be completed at the same time. The benefit is that the enterprise can manage and conduct secondary development on its own, completely eliminating technology lock-in and achieving independent controllability.
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