What does it mean to be a concubine first and then a wife _ What does it mean to be a concubine first and then a wife?

What is the difference between a concubine and a wife?

A man can only have one wife, including the emperor, and only one queen at a time. In the eyes of our ancestors, wife and concubine are completely two concepts. A wife is a wife and a concubine is a concubine.

Madame

[Transfer from Tiexue Community /chatgpt/