The first three photos are an #Anhui speciality: meigan cai¹ griddle cake, loosely translated. Usually, as far as I know, breakfast street food in the places of origin, here it's been modified to be more a snack food like potato chips. It was surprisingly good. It's not as good as the street food version, but a whole lot easier to get.
The second is the Chinese version of pork rinds. Basically it's lightly marinated pork belly that was sliced crossways and deep-fried until everything (including the fat layers) was crisp. Again this is actually quite often available as street food (and really delicious when fresh) though usually not made quite as dry as the packaged variety.
