2, independent hot pot generally independent ingredients, soup base can generally be selected, basically a spicy or not spicy choice. Ingredients are usually skewers or plates.
3. Rotating a small hot pot, diners usually take a plate or a rope and put the spare plate or rope next to it to facilitate checkout. The ingredients in the revolving hot pot may not be complete. After all, if it is taken away by other diners, there is no way to eat it. You can wait for the store to serve or ask.