Actually Taiwanese and Chinese(China) tend to be a little different in cue preference not entirely though. Example many Taiwanese love to play with fat shafts or big tip (13.2mm) but not so much in China.
Southwest is definitely one of the top favourite brands amongst both the Chinese and Taiwanese(there's a long and interesting story behind this..). That said many of these players are getting exposed to big brands early. I can't say for sure but I know MUSASHI is popular with top players as to who is using I can't be sure. Mezz is crazy popular in China as well.
Side note, is tough to group Chinese as a whole cos it's very different culture and habits between say China, Hong Kong and Taiwan. Though they're all called Chinese and considered China(with exception to Taiwan's debate with China on this) it's just too different of places. I'd go as far as saying it's like calling Italians, French and the English, Europeans, it's the correct term but all very different people.