On the issue of patent number

Not correct.

You can query according to what dopic said.

The publicity format must be correct, otherwise it will be mistaken for counterfeit patents, and the effect may be counterproductive. The correct format is: patent marks or words can be printed. The logo is from China National Intellectual Property Administration, and the words are "China Patent+Patent Number" and "CN+ Patent Number". Your mistake is that 004 100 1 ... is the application number, not the patent number. Just add ZL in front of it. (But make sure it is an authorized patent. )