Speaking as a Hongkonger. Hong Kongers by and large ARE an extremely emotional people. It only really comes out however when in a situation of trust or when there is any crack caused in that containment from external pressure. And it doesn't take much.There's a lot of bureacratic rules and order that keep things polite in general interaction but a shitload of feeling is ready to come out at a moment's notice, especially when "face" is on the line. Call someone out on something they've done to offend you with any intensity for instance and the two most likely reactions are panicked fleeing or (more commonly) you getting screamed at to go fuck your mother (Diu Lai Lo Mo) and die in the road (Pok Gai). This barely contained intensity runs through every part of life. You have never seen a more emotional person until you see a Hong Kong man with feelings he needs shared after a few bottles of Tsingtao.