Sure, there are many manufacturers of tourbillon movements made in China, - and no we don't have Seagull movements in our reps (the are very expensive). I know it is a review of the most commonly used tourbillon movements in reps, but I cant find it.
Take a look here for more info: http://chinesewatchwiki.net/List_of_Chinese_watch_movements#Tourbillon_movements
Take a look here for more info: http://chinesewatchwiki.net/List_of_Chinese_watch_movements#Tourbillon_movements