China can observe the time of Polaris.

As long as it is a good night, the northern sky is not covered with clouds and can be seen all year round.

Because the North Star is not very bright and difficult to find, the first step is to find the Big Dipper. The Big Dipper forms a bucket shape in the sky, which is easy to recognize. Its bucket handle is observed at eight or nine o'clock in the evening in different seasons. Bucket handle faces east in spring, bucket handle faces south in summer, bucket handle faces west in autumn and bucket handle faces north in winter. (The teacher teaches the formula: spring, summer, autumn and winter correspond to the southeast and northwest) Step 2, connect the first two stars of the Big Dipper and extend it to the bucket for about 5 times to find the North Star.