It's usually charcoal.

Grilled fish refers to a method in which fish are roasted and then cooked. This cooking method realizes "one roasting and two stewing". It is a new revolution in the grilled fish industry. Now most of the "grilled fish" refers to "Sichuan-style grilled fish".

Grilled fish, a special food originated in Wuxi, Chongqing, but developed in Wanzhou, is a delicious and nutritious flavor snack, which combines three cooking techniques: pickling, roasting and stewing, and fully draws lessons from the characteristics of traditional Sichuan cuisine and Sichuan-style hot pot.