HARBIN, July 16-- A very ill man in northeast China's Heilongjiang Province received death penalty for injuring 20 people with a knife, a statement issued by a local court said on Thursday.

Li Huaqiang, who suffers myasthenia gravis, went on the rampage in 2014 to take revenge on society, deeming that he was unfairly treated, said the statement from the Intermediate People's Court in Daqing City.

On Sept. 30, Li attacked 14 diners at a KFC outlet in Daqing and later injured six others at a Mcdonald's, where he was subdued by staff and diners.

The knife attack left seven people seriously wounded, said the statement.

The court ruling, handed out on Tuesday, ordered Li to pay one million yuan (163,500 U.S. dollars) to the injured as compensation.