How long does it take to declare CPC appearance patent and give up the right of electronic modification?

Do you mean electronic applications? Under normal circumstances, electronic application for authorization is very fast now. According to the different classification numbers, there are recent examples of receiving authorization notice within one month of application. Of course, after that, you have to pay the fee to get the certificate, but this is a procedure and the time is basically controllable. If it is an electronic application, there is almost no need to speed up, because it will be signed everywhere, and it may not be so fast in the end. If it is a paper application, it is worthwhile to speed up a little.