Where did the extra hour of daylight saving time go?

Daylight saving time is a man-made system for saving energy. Generally in summer, when the sun rises earlier, you can artificially advance the time by one hour, so that you can go to bed early and get up early, thus saving electricity.

China implemented it for six years from 1986 to 1991. Because the power saving effect was not good, it was no longer implemented after April 5, 1992. So at present, most people born before the 1970s will remember our daylight saving time. They remember that it was really inconvenient at that time. They had to adjust their watches and alarm clocks by themselves. If they forget, they will be late for school or work. Morning, there are a lot of jokes. Later it was stopped and everyone felt much more relaxed.

There is not an extra hour, it starts one hour earlier and ends one hour later, no more, no less.