you can call the patent office and tell the relevant personnel your ID number or company name, so that they can tell you your user name.

These will be recorded on the Internet, so calling for advice is the easiest choice.

China National Intellectual Property Administration, whose full name is China National Intellectual Property Administration of the People's Republic of China, is a national bureau managed by the ministries and commissions of the State Council, and managed by the State Administration of Market Supervision, with the administrative level of deputy ministerial level. Responsible for the protection of intellectual property rights, promote the construction of intellectual property protection system, be responsible for the registration and administrative adjudication of trademarks, patents and geographical indications of origin, and guide the law enforcement of trademarks and patents.