According to historical records, Chongqing hot pot can be traced back to the Song Dynasty. This is recorded in historical facts.
In the Song Dynasty, there was a man named Lin Hong. This man loves writing books, not so much writing books as keeping a diary. He keeps detailed records.
Once, he recorded such an event, which was about "eating hot pot".
On that day, he traveled to Wuyishan, and in the process of playing, he accidentally caught a rabbit in the snow. It happened that he was hungry, too, and he thought about how to make the rabbit eat. So he found farmers on the spot and got some vegetables, wine sauce (something similar to the soy sauce we ate), big peppers and aniseed.
So he killed the rabbit, skinned it, marinated it with the seasoning he got, put an air stove (maybe a stove or something) on the table, made a pot on the air stove and put water in it. When the water is boiling, rinse the rabbit meat in boiling water and dip it in those seasonings, and it will be delicious.
From the point of view of eating method, Lin Hong's eating method is very similar to the "rabbit hot pot" in Chongqing hot pot, which may be the original method of Chongqing hot pot.
Thank you!