What you are talking about are famous quotes, they are from China, and they must be from 1949 to the present. Regarding morality, I have found a few that can be used as a reference

1. If you have true morality, you will have true courage. Anyone who is afraid of heaven, earth, people, and ghosts must have ghosts in his heart and must have bad conduct.

Xuan Yongguang

2. When others help me, I will never forget them; when I help others, I will never forget them.

Hua Luogeng

3. Once we achieve something, we cannot be like a ball that cannot be hit by others. It can jump as high as a tap. The greater your achievements, the more modest and cautious you must be.

Wang Jinxi

4. They don’t stretch out their hands when it comes to honor, they don’t stretch out their hands when it comes to treatment, and they don’t stretch out their hands when it comes to material things.

Wang Jie

It’s a bit difficult to find too few variables