Tiem Thuoc Bac Hong Kong

This is an amazing store which sells all of the Chinese teas herbs and traditional medicines you could possibly want.
Friendly staff, but don’t expect them to speak much English.
Assorted other Chinese dried and preserved goods as well.
Go here for their tea and herb selection.
I went in wanting bulk green and bulk mint tea — the bulk green tea was extremely easy — they have a massive wall of it, with prices, and they’ll scoop it for you. The mint was more of a problem — they had a generic box of cheap mint tea, and in broken /​pidgin English I managed to explain that no, I wanted whole leaves in bulk, like the green tea. Once the woman working there «got it» she pulled out a drawer overflowing with beautiful mint leaves from the medicinal section. They were so cheap it was silly — a massive bag for $ 2 or so.
Plenty of other interesting things in bulk; I bought some Asian candies, some mushrooms, and other stuff I didn’t need.