Let's look at Journey to the West again. The journey to obtain the scriptures is full of human relationships and worldly affairs.

Why is Sun Wukong's fighting power getting weaker and weaker in Journey to the West, and he can't beat anyone slowly? In fact, he has matured. As long as there are people in heaven, such monsters will generally be spared.

It is to give face and leave some merits for others to help obtain the scriptures.

So who knows more about Tang Seng's background?