As for jewelry, you can go to Xie Ruilin, Chow Tai Fook and Zhou Shengsheng, and you can buy some gold ornaments for your mother. Some are expensive, some are cheap.
There are many excellent shops on the streets of Hong Kong, and the products of each shop are different. The best thing is that the products discounted by each store are different. There are also sending colleagues to Youzhi Liangpin to buy mustard beans and sweets, all of which are big bags with many small bags inside. You can send it in pieces. There are many varieties and they are delicious. Much more affordable than Shanghai!