Installing a ceiling light fixture in USA that was purchased in HongKong?
If it's a simple light fixture that does nothing more than hold bulbs, there's only a couple things to check.
Socket base
The first thing to check is the socket base(s), size and shape. I'm not sure what's common in Hong Kong, but you'll want to make sure bulbs from the US can fit in the sockets.
Wire size
The next thing to check is the size of the wires in the fixture. You'll want to make sure they're large enough to handle the load of the lamp(s). It will completely depend on how the fixture is wired, but 18 AWG - 14 AWG is common in US fixtures.