1. Original
If you have a constant, why go to bed at night and get up at five o'clock; It is the most useless thing, nothing more than ten days of cold every day.
2. Source
This is a couplet written by Mao Zedong based on Yan Zhenqing's poems.
Step 3 explain
It means that as long as you have perseverance, why get up early and go to bed late every day to do things? The worst thing is to take a day off for ten days.
Step 4 enjoy
The meaning of this couplet is that you must persist in doing things, and you can't fish for three days and dry the net for two days, otherwise it will be useless.