Beijing: Luo Wenyou Classic Car Museum 北京老爷车博物馆

Open for public since May 2009. About 160 cars, many of Chinese origin. Hugh Hongqi collection, 20 classic Hongqi cars exhibited. Unique 10m based long wheelbase Hongqi limo. Cars are more or less restored, in minor condition.
Luo Wenyou's personal website: http://www.laoyeche.org.cn/
An overview of many exhibited models:   

http://carnewschina.com/tagbeijing-classic-car-museum/

https://chinacarhistory.com/2019/10/03/visit-to-the-beijing-classic-car-...

http://www.autohome.com.cn/culture/201506/875925.html 
https://zhuanlan.zhihu.com/p/60558492
https://post.smzdm.com/p/a25r7v62/