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[Edit]After letting the comment through Babelfish automatic translation, it seems that xiaomiejapan is not happy with the given solution. However, I think there are no other way for them but to wait for Alwil to decide if this is false positive or not. 
Not wait, first the sample has to be sent to avast for analysis and correction of the VPS.
Send the sample to
virus@avast.com zipped and password protected with password in email body and false positive in the subject.
Or you can also add the file to the User Files (File, Add) section of the avast chest where it can do no harm and send it from there (select the file, right click, email to Alwil Software). No need to zip and PW protect when the sample is sent from chest. A copy of the file/s will remain in the original location, so any further action you take can remove that.
If it is indeed a false positive, add it to the exclusions lists (
Standard Shield, Customize, Advanced, Add and Program Settings, Exclusions) and Restore it to its original location, periodically check it (scan it in the chest), there should still be a copy in the chest even though you restored it to the original location. When it is no longer detected then you can also remove it from the Standard Shield and Program Settings, exclusions.
