Perhaps you haven’t heard of the Uyghur genocide by the CCP in Xinjiang. The local population very much does care about their local time zone (and language and culture, other things the Chinese government has stripped away from them). It may be one of the few places where you’ll get a different answer to the question “what time is it” depending on the ethnicity of the person you ask, and, if asked, you might get arrested for answering with the “wrong” time.
https://en.m.wikipedia.org/wiki/Xinjiang_Time