If you have perseverance, why sleep at three o'clock and get up at five o'clock?

The most useless thing is that it will only be cold for ten days in one day

------Mao Zedong< /p>

Bones are said to be cut, elephants are said to be consulted, jade is said to be cut, and stones are said to be polished; by cutting and polishing, they become treasures; people's knowledge and knowledge can be achieved just like bones, elephants, and jade are polished.

All in one go. It will weaken again, and it will be exhausted three times. When it is exhausted, I will be full, so I can overcome it.

Three feet of ice cannot be frozen in a day

A drop of water can penetrate a stone, but it cannot be a day's work