I don't know and it doesn't matter, the result is the same. The Triads don't want Hong Kong to democratize, because they will lose power. They want to keep a status quo where they can profit from corruption, and they might think this is a way of keeping the established order. Since the interest of the triads and the Chinese and Hong Kong governments are intertwined, I dont think this is necessarily a case of the Triads receiving direct orders from the Chinese government, yeah.
Umm..alot of triad member, even Taiwanese gangster like whitewolf(https://en.wikipedia.org/wiki/Chang_An-lo) have ties to China and are for China unification.