"地溝油"

This is Death Oil for Cooking.

Changing (the waste oil which accumulated in drains, such as a factory, a drain, etc.) to cooking oil, Chinese people use for Chinese food. 地溝油 which was dark red is reproduced by cooking oil of yellow- white colors through decolorization and tasteless processing.

In this way, the manufactured oil has the low ignition point and, in a dangerous top, the toxin contained has big influence on a human body. In that of Talien, and a certain hotel, such a private oil-refinement place was established in the underground room.

The underground room is also the employee's bed and, naturally 地溝油 before refining contains drainage from the household.

An employee's feces and pee are also mixed with this oil in that process.

Rich Chinese walks around with salad oil by himself, and asks "Cook using this oil" at the restaurant in the street.

Advice is given to you.
Please do not have a meal in Olympiad Games Beijing except a classy restaurant.

This is the common sense at the time of dining out by People's Republic of China.