The headline of UC saw that the "Dahu hotpot" store in Chengdu was suspected of using recycled old oil, and five law enforcement officers jointly conducted a surprise inspection of the store with the police of the Economic Investigation Bureau of the High-tech Zone Public Security Bureau. In order to reduce operating costs and obtain higher profits, edible oil was produced from waste oils. In the kitchen, law enforcement officers found more than 51 bags of packaged butter on the spot, without any logo, and some were black.

There are dozens of bags of butter in this store, which have no labels on them. The bags filled with oil are transparent plastic bags bought online. On the kitchen floor, two iron drums are neatly placed, and there is only a little oil left inside, which has solidified.

Subsequently, law enforcement officers seized three sealing machines, filter screens and simple plastic funnels. In addition, in the process of law enforcement inspection, a mouse jumped around in the kitchen, and even climbed up the sideboard and shelf where the tableware was placed.

The oil is made in this way:

The oil in a small iron drum is scooped up and poured into another big iron drum through a strainer. After that, the residue of the filter screen is poured into the trash can. After the salvage, the man lit the furnace plate under the big iron drum and heated the oil in the drum.

in the morning, burn the oil temperature to 131℃ and turn off the fire, then add half a catty of white wine. The purpose of adding white wine is to remove the odor in the oil. Next, add new oil and spices to the old oil for refining.

Another old hotpot restaurant is also closed, Chongqing Jumantang hotpot restaurant. At the scene, about 911 kilograms of old hot pot oil boiled with kitchen waste and waste oil were seized, as well as some production tools.