Haidilao's "sea exhaust" system is actually a one-stop smokeless purification system. The chafing dish fume, steam and harmful substances generated during the use or production of its equipment can be captured locally through the exhaust hood or exhaust equipment, and transported to the purification equipment for treatment through pipelines. After reaching the emission standard, it can be reused or discharged into the atmosphere. This system can dehumidify, reduce the temperature in the hot pot restaurant, make the guests feel comfortable, reduce the use of air conditioners and save energy.