HK is free trade zone. I think you can bring them in as long as they are not drug, trash, weapon or other harmful thing. You should have invoice and pack slip along with the product. I believe they will be smuggled into mainland finally.
you need to declare when you export. There might be some problems. if US customs think they are hi-tech or military product, then you will get a lot of troubles i know one white man who was born as American citizen. he got background check for three month when he tried to export something.
【在 l*****r 的大作中提到】 : you need to declare when you export. There might be some problems. : if US customs think they are hi-tech or military product, then you will get a : lot of troubles : i know one white man who was born as American citizen. he got background : check for three month when he tried to export something.