How to calculate the publication time of patent certificate

1. How is the authorization time of patent certificate calculated in China? = "It takes about 3-4 years from the application to the authorization of the invention patent; The new patent is about 1 year; Appearance patent is about 6-8 months.

2. Whether it is consistent with the publication time is inconsistent =, the publication time of the invention is earlier than the authorization time; The appearance and new type patents were granted earlier than the public time.

3. The other is to have a patent certificate. ××× in the upper left corner of the patent certificate. How did this happen? Can we find the patent certificate number? Is XXX the content of this patent? = "This is the certificate number. Generally, we don't query the patent according to this number, but we can query the patent content according to the patent number or WeChat official account.