Time zones! At least China does. Many countries in the neighborhood, including Burma, India, Afghanistan, and Iran, have time zones on the half-hour (as does Australia). Nepal has one on the three-quarter hour -- when it's midnight UTC in London, it's 5:45 am in Kathmandu. But China has one great big desert-to-sea time zone covering a country about as big as the United States. As Joshua Rosenzweig points out by email, in response to this post about the curse of sunrise-at-4:30am in Shanghai:
Before you could implement daylight time for China, you'd probably have to implement time zones first. Remember, "Beijing time" stretches from the forests of Manchuria all the way to the bazaars of Kashgar and from the steppes of Mongolia to the tropical Hainan Island. In fact, if you want daylight savings time you should head out west to Xinjiang, where daylight already lasts well past 9pm all summer long. Of course, some accommodations are made to adjust to local conditions in places so far west of Beijing, but this is not really the same thing as actual time zones. But I think to ask Beijing to implement anything that promotes the concept of regionalism is a tall order.