omnia bene erunt ⏾⋆.˚

you can find things like: * this map of chang'an when it was the capital of the tang dynasty

or * this reference on the various measurements and units, their conversions to more widely known western units, and their regional/dynastic variations or * this list of sayings related to marriage

it's neither abt "computers" nor "science"

Hi, thanks for the question, and sorry for taking ages to reply! (Kunqu opera photo via):

As you noted, there are various genres of traditional opera in China. Pretty much every region of China has its own regional opera. When I say Chinese opera, I'm referring to Chinese opera in general (all genres), not just Beijing opera.

Yes, Chinese opera clothes (xifu/戏服) and makeup can vary drastically across genres, with many operas being visually distinguishable by their distinct styling.

For more references, please check out my tags for Chinese opera and opera costume (I also have tags for individual genres of Chinese opera). Also, please see my other replies about Chinese opera here:

Do Chinese opera costumes count as Hanfu? 

What type of clothing do Beijing opera actors wear?

Do you have a post Chinese opera costumes?

In addition, @peekofhistory has several informative posts about Chinese opera, including this one.