1. Don’t lose confidence, as long as you persevere, you will eventually achieve results. ——Qian Xuesen

2. Correct results are derived from a large number of mistakes; without a large number of mistakes as steps, we will not be able to reach the high seat of the final correct result. ——Qian Xuesen

3. “Nothing is final.” (No knowledge is final) ——Qian Xuesen

4. Knowledge was boundless. ——Qian Xuesen

5. It is often the last key that opens the door. ——Qian Xuesen