是亲不是亲，非亲却是亲。兄弟相害，不如友生。
有些人是亲戚却不像亲人，而有的人不是亲戚却比亲人更亲近；兄弟之间如果互相伤害，那还不如朋友。
The challenge in theoretical computer science is not just to solve problems, but to understand the nature of problem-solving itself.
Sustainability is not a destination, but a journey that requires continuous improvement and innovation.
Rule of 7 in research. You can find out anything if you are willing to go seven levels. If the first source you ask doesn’t know， ask them who you should ask next， and so on down the line. If you are willing to go to the 7th source， you’ll almost always get your answer.