On-the-job certificate is generally a certificate of work income, which is an economic income certificate that China citizens need in their daily production, life and business activities. Generally, when handling visas, bank loans, credit cards, etc., the relevant units will be required to issue them. If you do it yourself, follow these steps: 1. Pay attention to the necessary format when opening a work certificate. 2. The work certificate must be stamped with a "fresh seal", that is, the copy of the income certificate is invalid. 3. The seal must be the official seal of the unit. And it must be a round stamp. Handling method: you can find the personnel department of your work unit or entrust a friend company to handle it on your behalf. You can also find a regular agent in the market. This is to certify that Mr./Ms. XXX, date of birth, gender, ID number, has been working in a certain department of a company since a certain month, and how much is his monthly salary. This is to certify that. Signature of legal representative (person in charge): unit name (official seal): year month day unit detailed address: unit contact person.