You can't judge a book by its cover. How to write next?

How to say the next sentence depends on the situation. If it is the object of choice, it should be "depending on the connotation"; If it is other circumstances, it can also be said that it is "knowing people and knowing their faces"; If you are talking about an ugly person, you can say, "You can't judge a book by its cover." . Beautiful mood team, sincere doubts, satisfaction please adopt.