Why did China cancel daylight saving time?

China's cancellation of daylight saving time is mainly based on the following three points:

1, China has a long east-west span, but it takes the same time, while the United States uses four different time zones from east to west. The suitable time in the east of China is too early for the west. It is dawn in the east and it is still dark in the west. For the whole country, the use of daylight saving time can not achieve the purpose of energy saving and emission reduction.

2. There is a lot of room for daylight saving time in high latitudes, because the time between day and night is very different in high latitudes. However, China's economically developed areas are concentrated in the Yangtze River Delta, Pearl River Delta and other areas with relatively low latitudes, and the sunshine time in summer is not so long, so there is not much room for implementation.

3. 199 1 year, Qinshan nuclear power station was officially put into operation, and Daya bay nuclear power station under construction will also be put into commercial operation two years later. At that time, the technology and equipment upgrading of China electric power enterprises began to achieve results, and many hydropower stations were built. The power generation modes in China are increasingly diversified, and the power supply problem has been alleviated to some extent.

1986 in April, the relevant departments of the central government of China issued the Notice on the Implementation of Daylight Saving Time nationwide. The specific measures are as follows: starting from 2: 00 am on the first Sunday in mid-April every year, set the hands at 1 hour, that is, from 2: 00 to 3: 00, and start to implement daylight saving time; By 2: 00 am on the first Sunday in mid-September, the clock will be put back one hour, that is, the pointer will be set to 1 from 2: 00, and the daylight saving time will end.

During the six years from 1986 to 199 1, except that 1986 is the first year of daylight saving time, all other years are implemented according to the specified time period. A few days before the start and end of daylight saving time, the news media published notices from relevant departments.