2. After entering official website, State Taxation Administration of The People's Republic of China, China, find the "Invoice Inquiry" item under the tax service platform, and click Enter.
3. After entering the platform, you can see the relevant instructions in the lower left corner. If this is the first query, you must install the root certificate. In addition, you should check the next day at the earliest, up to 5 times a day.
4. First, click Install Root Certificate. Automatic installation is generally selected. Please follow the instructions.
5. Fill in all the information on the invoice, enter the verification code, and then click Check to come out.