I don’t even think we need time zones. India and China do not observes DST or time zones and they aren’t having any problems waking up, going to work, or living due to the hour on their clocks.
The majority of the population of those countries is distributed on a north-south axis.
China's population is primarily on its eastern plains, not the western mountainous regions.
India has one time zone, but it's still covers more degrees of latitude than longitude, so the difference in sunrise time between Kolkata in the east and Bombay in the west is about an hour. This is about the same as the difference in sunrise time between Boston and Kalamazoo, also both in the same timezone.
Looking at the article the Xinjiang Time looks more political than functional with the result being confusion and nonsense. Political divisions are the only practical reason why people maintain time zones. There are people through out the world who do just fine living on UTC or Zulu time.
