Zu Chongzhi of the Southern Dynasties, under extremely primitive conditions at the time, performed a large number of complex calculations on small pieces of bamboo. Over and over again, after countless failures, he finally became the first in the world to accurately calculate the circumference of pi. The seventh decimal place.

The great inventor Edison made countless failed experiments in the process of inventing the electric light. In total, he tried more than 6,000 fiber materials before finally deciding to use tungsten filament as the filament. Improves the service life of the lamp.

Famous aphorisms:

Frustration is the step forward for the strong and the bottomless abyss for the weak.

After some setbacks, you gain insights

For those who persevere, there is no such thing as failure.