Hot pot was invented by the tracker in Chongqing, because the tracker was poor and the wind on the river was very cold. They can only buy some cheap things like beef offal, stir-fry Pixian watercress, dried pepper, pepper, salt, garlic, ginger and onion with butter, and eat enough to drive away the cold. This method was known to the rich, who added all kinds of good spices and carried it forward.