Where can I see all 88 constellations?

The Polaris seen by Wuhan observers is just north of the horizon, with a height of about 30; The observer in Beijing is about 40, and the North Pole is 90, that is, the North Star is overhead. According to this inference, the North Pole can only see 1/2 of the sky, while the equator can see 88 constellations all day.

You can see all the stars in the southern hemisphere and the northern hemisphere on the equator. Although they are not at the same time, it will only take about a day to see them, but you can't stay at night all the time! ! !