Most Chinese street food vendors, like this Muslim night barbecue seller, use safe, healthy oil.
I am a big fan of Chinese street food. In every city in China, hundreds of vendors sell snacks on the street, from a cart or from a small booth or table. Some of them are licensed, and some are illegal: you can tell the difference when the 城管 (Chinese city police who enforce street vendor licenses) arrive. The legal vendors remain cool, but the illegal ones pack up their gear in seconds and run off. But in either case, you can find some seriously delicious street food all over China.
Food Ergo Love 