What the code actually encodes

The 18 characters are not a serial number. Each block means something:

91411627MA46F4KT7T

registering authority entity type administrative division subject identifier check digits

Two of those blocks are worth money to you. The entity type tells you whether you are dealing with a limited company or an individual trader — a distinction that does not survive translation into English marketing copy. And the division code tells you which authority actually registered the business, which you can hold against whatever address they gave you.

Why "individual trader" matters before you wire money

A code beginning 92 is a 个体工商户 — an individually-owned business. It is a legitimate, very common form. It is also not a company: there is no separate corporate entity, no shareholders, and no company assets standing behind the contract. If the deal goes wrong, you are pursuing a natural person.

Plenty of good suppliers are registered this way, and plenty of deals with them go fine. The problem is not the form — it is finding out afterwards. A supplier presenting themselves in English as a "manufacturing company" with a "factory" may be one person with a licence, and their English materials will never tell you.

Registered capital is the other trap. Chinese licences print a registered capital figure, and Western buyers read it as money in the bank. Under the subscription system it is the amount the shareholders have committed to pay in, on a schedule set in the articles — not necessarily cash that has ever existed. A large number on the licence is a promise, not a balance. Treat it as one.

What this tool cannot tell you

It cannot confirm the company exists. A valid checksum proves the number is well-formed. Only the official registry at gsxt.gov.cn can confirm a real, current registration.
It cannot tell you whether they own a factory. Business scope on the licence hints at it; only inspection settles it.
It cannot tell you whether they are solvent, or honest. A real licence is the floor, not the ceiling.
A failed checksum is not always fraud. The most common cause is a transcription error. Ask for a photograph of the licence before concluding anything.

This catches fabricated and mistyped numbers, and it tells you the entity type and the registering region. That is a genuinely useful first filter. It is not due diligence.