Little Sheep: I think I've seen the brand H2O in Uniprix before. It's a series of perfum and cream. But I am not sure it's the same brand as the one sells in SH and BJ.
I think u can try Clinique's "moisture surga extra- thirsty skin relief" (it fits your requirement of 补水) or other brand's 濕凝霜 (i remember AVON has one similar product, and the price is much lower).
But actually u can use some cream and should have some oil too. Because oil can protect water loss of your skin.
Good Luck!