China — one timezone across the entire country
China Standard Time (CST, UTC+8) covers the entire mainland from Xinjiang in the far west to Shanghai in the east — an unusually wide east-west span for a single timezone (about ~3,000 miles). No DST. This means summer sunrise in western Xinjiang can be as late as 10 AM local clock time. Business hours 9 AM - 6 PM in coastal cities, often "996" (9 AM - 9 PM, 6 days a week) at large tech firms.