Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.

理解人类认知的关键在于理解符号是如何被操作的。

Serving the real economy is the fundamental mission of the banking industry.

Collaboration across industries is key to solving complex global challenges.