Yeah, that's why my husband loves traveling with me ;-) I don't use 100% DEET all the time - I will in areas with malaria or dengue, but not at home in the US. I suppose I engaged in a bit of hyperbole - if I can get 100% DEET at my local walmart or other drug or big box store, I can get other percentages there as well. No need to travel to a specialty hiking/camping store.

And for OP, since I think this is about a kid who'll be in China for a few weeks (based on other threads?) it's good to know that even if s/he brings some over to start off, it's easy to get more at a local convenience store in Shanghai.

Also, my husband LOVES those little convenience stores every 50 ft because whenever he'd get hot from all the walking around we were doing, he'd pop in and get a cheap cold beer and perk up for more walking :-)