Here is a typical wok set-up in China. This is outside a small photographer's studio near my home. Mainly passport type photos from what I can see. I spotted it this noon. Rather than close the shop / studio for lunch the woman photographer makes lunch on the street outside her place.
The shop next door is a hairdressing place and the staff there (about 4) take turns each day to make lunch on a similar set-up. As do many small businesses.