Come from China "Waste oil"
Waste oil be used for cooking oil in China.
Many people don't konw this.
But somebody do this evildoing.
They use the waste oil for cooking food then sale the food for people, and don't care people's health.
Waste oil can be divided into three categories:
One is a narrow trench oil will drain the greasy floating debris or to hotel, restaurant leftovers, leftovers (commonly known as swill) after simple processing, refined oil;
Second, poor quality of pork, pork offal, pig processing and output of refined oil;
Third, the oil used for frying foods exceed the prescribed number of times, then repeated use or to add some new oil re-use of oil.
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