I've ordered a handful of stuff from China with no problems. Generally quick shipping. I wouldn't order anything from Huawei via FedEX. That is probably not a good idea, because you could wind up on an official list, and who needs that?
I ordered some Buddhist mantra CDs from Malaysia, which took a couple of three months to arrive. Probably because they were so popular it was a backorder. But ever since Tower Records closed, where else are you going to get that sort of thing?
I have no idea about customs. Most of my orders have been low dollar. I've been thinking about a boron cantilevered Microline stylus for my V15xMR. JICO Japan has them for $200.00, shipping under $25.00. We'll see.