In Chinese, 盒子 (hézi) literally translates into box -- an edible box, of course. A typical “box” that you’ll see sold as a quick street food item consists of chopped chives and eggs (or some other variation of that) stuffed into a dough “box,” although that box is shaped more like a crescent moon. I like to think of them as the older cousin of dumplings. Both are like savory pocket pies, but hézi usually are larger, have more filling, and a crisper skin.
Inarizushi (inari sushi) is a kind of sushi ball where the sushi rice is stuffed into Aburaage tofu pockets (which you can get for pretty cheap right here). They're super easy to make, and even easier to eat, so I'd definitely say they're the perfect finger food!