This article is contributed by the STOMP Team.
China's street food and restaurants are filled with black market oil processed from rubbish and sewers known as 'gutter oil'.
In this new documentary by Radio Free Asia, we learn the disgusting origins of the oil used to cook food in about one-tenth of China's food industry.
In this video, a woman is seen opening up a manhole to uncover sewage material she finds 'valuable', which is then processed into cheap oil sold below market rate.
The government has already banned 'gutter oil', but the practice remains fairly common.
Controversial food practices in China is not something foreign to us anymore, but eating food cooked with processed garbage is revolting on a new level.
Watch the video below.