Sheng, Dan, Jing, Chou, why is Mo missing? Learn all the roles in Peking Opera in one go

Everyone still remembers it, right?

The five elements of Peking Opera that I learned when I was a child:

Sheng, Dan, Jing, Mo, Chou

Now there are only four lines left:

Sheng, Dan, Jing, Chou

Then the question arises:

What about the end? Why is it gone?

Don't worry, I'm giving you some scientific knowledge.

Today, I will take you into Peking Opera.

Help you understand in one go: the four major roles in Peking Opera!