1. Open the browser Baidu homepage, enter "State Administration of Medical Supplies", and click Enter.

2. Find the icons of "drugs", "medical devices" and "cosmetics" in official website and State Administration of Pharmaceutical Products, and click the arrow to enter.

3. Enter the product to be searched in the search box (company or drug name is enough).

4. Related products will pop up after the search. Find "Details" on the right and click Enter.

5. Find the "approval number" on the details page, which is the product registration certificate.