To begin with they don t.
Chinese use gutter oil.
The chinese food black market uses gutter oil as cooking oil which is unhealthy and can be fatal.
China has a known problem with counterfeit cooking oil made illegally by gangs.
Cooking oil is used heavily in chinese food so some street vendors and hole in.
The difference between per kilogram of oil mixed with rapeseed oil and non adulterated rapeseed oil was 6 yuan.
Dìgōu yóu or 餿水油.
According to the analysis the price of 1 ton of gutter oil was the 1700 1800 yuan while the price of 1 ton of rapeseed oil was 7000 8000 yuan.
If a small restaurant use oil 5 kg per day they choose the gutter oil can save 30 yuan.
This is generally known as gutter oil chinese pinyin dìgōu yóu simplified characters 地沟油 traditional characters 地溝油.
1 out of 10 lower market meals in china are cooked using gutter oil.
Not just inferior cooking oil relabelled as well regarded brands but made from waste oil and rotting animal parts.
It can also be used to describe the processing of waste oil collected from sources such as restaurant fryers grease traps slaughterhouse waste and.
Cooking oil is used heavily in chinese food so some street vendors and hole in.
The oil contains contaminants pathogens and other potentially lethal chemicals.
Most of china s gutter oil winds up in cheap restaurants and among street food vendors.
China s food safety problems have no better symbol than the illegal and utterly disgusting problem of gutter oil.
What you are referring to is called gutter oil scandal which broke a few years back in which it was found that some street vendors were using oil illegally recycled from slaughterhouses and other industries etc.
Sōushuǐ yóu is a general term for oil that has been recycled it can be used to describe the practice of restaurants re using cooking oil that has already been fried before.
China s food safety problems have no better symbol than the illegal and utterly disgusting problem of gutter oil.