Ooh - mycelium textiles, maybe?) but it's actually suspicious how very similar the streetwear is to Dragon City's. So I could accept that there's probably smuggling going on.
I'm willing to buy that they have their own textiles, but Haixing streetwear is prestige, so the only people who use the native things are the officials. Tradition loses to coolness. :P

...I would not want to be the person in my neighborhood of Dixing with the contraceptive power. Well, okay, you'd have job security for life, but you'd also know things about everyone.
Depending on how the power worked, it might be a better power than a lot of other ones with good job security? (Contraceptor vs poop teleporter, frex.)