How to distinguish old oil from disposable pot bottom when eating hot pot?

Today, I will teach you two tricks to tell whether the bottom of a pot in a hot pot restaurant is a disposable bottom:

First, look at the color: the new oil and the old oil are very different in color. The disposable "new oil" pot bottom is bright in color, and you can see it when you pour it into the pot, and even vaguely see the reflection of the pot bottom, while the old oil is dark red with a little black in the red, which is generally turbid.

Second, look at the oil layer: generally speaking, the surface oil layer at the bottom of disposable "new oil" pot is about 1cm, while the surface oil layer of old oil is generally more than 2 cm; Also, when the bottom of hot pot soup is cooked, if it is the bottom material cooked with new oil, the foam on the bottom of the pot (actually chicken essence) will disappear soon after boiling, while after the bottom material of old oil is boiled, the foam on the surface will not disappear, but will accumulate more and more.

After eating hot pot, you can pay attention to observation, so that you can be protected from lightning in the future.