Chicken pot is a feature of Chongqing, and there are many brands, but the joining fee is only paid once. For which brand you join, you should ask them how the brand usage fee is charged, because the brand usage fee is usually limited, and most of them are paid annually.
The brand usage fee is usually not much money. Some brands will let you use it for the first year for free, while others will get lower and lower as time goes on.