If you look carefully, you will find a group of people eating, but in fact, few people are really eating. They are all talking lines, and everyone is picking up food. If you want to eat, those foods are all heated in advance.
Food is really only eaten when playing hot pot or barbecue, because actors really want to eat it. Before preparing the ingredients, the actors will go to the supermarket to buy them together. Everyone chooses what they like, and then they will burn it when filming, which will be delicious and the filming will be completed smoothly.