I have, both in Guangzhou and in Nanning.  This was a local league, and in all cases the games were good enough to keep me entertained, even if in reality not too technical or super players.  I would guess all players were from 18 to 25 years of age.

We also started a few years back a softball league among Ex-Pats locally.  We meet every Saturday afternoon at 2 pm for a game.  Barely enough for two teams at first, now we have 6, two of Ex-Pats and four of Chinese College students mostly.  We play at the Guangxi University grounds. 

I have been to a few Chinese Basketball Association games in Shenyang. The games were enjoyable enough,the imported players are of a good standard as are a few of the locals although the depth of talent is not so good and the arena lacked atmosphere as the crowd were not really into it.