(Still machine translated, but I glance at it)

For another example, you changed the phone number to "+86 773 588 6611" in https://www.openstreetmap.org/way/699616200, but as a local editor in China, it is obvious that "773" is because of removal of the area code of "0773"(Guilin, Guangxi) by mistake, and this is a landline phone number not a mobile phone number
According to the E.123 standard you are referring to, it should be

(0773) 588 6611

But I'm not sure my understanding of the E.123 standard is correct, so I would also like to get your opinion.

I think it is necessary to point out that in China, landlines and mobile phones use two different numbering systems, landlines have area codes, while mobile phones do not