Quality is not a destiny; it is a design.

The most sustainable package is the one that gets reused and recycled endlessly.

Natural experiments are a powerful tool for understanding causal relationships in the real world.

I believe in the power of perseverance.

钱财像粪土一样轻贱，仁义像千锭金银一样贵重。

人生而自由，却无处不在地受着枷锁。