Depth, you should have a foundation and understand the literary basis of the characters; For example, I like Zhuge Liang. I know his advantages and disadvantages and how to do things. Innovative, unique, multi-angle and multi-position, and finally comprehensive comments, such as I don't like Zhuge Liang, I know his shortcomings prevented him from completing the great cause of assisting Liu Bei.

When writing a character, you should know everything about him from the background before making comments. When writing, you should describe him through typical events in various periods, plus some comments of your own. Be rich and profound and don't talk nonsense.