The kind of pot you are talking about is called "electric hot pot" and is sold in ordinary shopping malls and supermarkets. It is also available in wholesale markets such as Sijiqing and Yatai. Sijiqing is located between Jianshe Street and Jianshe Street on Jianguo Road. The section between Hebei Street and the section between Gangcheng Street and Jianshe Street on Minzu Road in Yatai are not expensive. It is estimated that 100 yuan can buy a pretty good electric hot pot!