1. The correct result is derived from a large number of mistakes; without a large number of mistakes as a stepping stone, you will not be able to reach the high seat of the final correct result.

—— Qian Xuesen

2. The steps are built layer by layer, and the current reality is the foundation of future ideals. If you only think about the future and don't start from the near reality, you will have no foundation and it will become an illusion.

——Xu Teli