Nah I don't think you'd get fat. Though the first few months here I ate nothing but baozi (stuffed meat buns) and dumplings lol. Icecream and candy are also super cheap so I wasn't the healthiest and I did put on a bit of weight. It was to the point where I was traveling with friends in Inner Mongolia and a stablehand who takes care of the horses at the ranch we were at (who I didn't know) came up to me and patted my stomach and laughed. After that I started hitting the gym. The reason I was getting fat was from the convenience though. You can order food at the push of a button and a guy on a scooter will come hand you your food, no tips or anything.
Welcome to Steemit by the way!!