a levee of a thousand miles is broken by the hole of an ant; A room of 1 feet burns with smoke from a sudden gap. -

p

p < p -Zhou Enlai

Mistakes are inevitable, but don't repeat them. -Zhou Enlai

The correct result comes from a large number of mistakes; Without a large number of mistakes, we will not be able to climb the high seat of the final correct result. -Qian Xuesen