How long does it take to grow a thread a day?

A day is a long line, and the specific time should be within 2 minutes.

In some places, there is a saying that "winter solstice is nine, 192 miles and a half, more than 295 miles", which means that the number of nine begins on the day of winter solstice, and then the daytime will be extended every day. By the end of September, it is necessary to walk two and a half miles more than on the day of winter solstice.

By February 9, we can walk more than five miles. One mile is 500 meters, and two and a half miles is 1250 meters. The walking speed of people is about 1.2m/s, which is about 17 minutes. It can be seen that the specific time to grow a line a day should be within 2 minutes.

The origin of this proverb:

If you meet a real person, you will really get to the bottom of it. And the specific time of this "first line" is about 1 minute. The farmer has a classmate. He is a tour guide and often takes groups to watch the sunrise.

Listen to him, if you want to go to the seaside or the top of the mountain to watch the sunrise, you will be one and a half minutes earlier every day in winter and one and a half minutes later than the day before in summer.