HANGZHOU, April 1 -- An east China court has upheld the death sentence of a man who fatally stabbed one doctor and wounded two others at a hospital in east China's Zhejiang Province in October.

Zhejiang's provincial Higher People's Court on Monday dismissed the appeal of Lian Enqing, 33, who stabbed the doctors on Oct. 25 in the ear, nose and throat department of the No. 1 People's Hospital in Wenling City.

Aside from the doctor who died, another was seriously injured and a third suffered minor injuries in the attack.

Lian was sentenced to death in the first instance trial by the Intermediate People's Court in Zhejiang's Taizhou City in January. The court also deprived him of his political rights for life.

Lian had surgery on his nose at the hospital in March 2013. According to Liao Qiao, Lian's sister, he felt displeased after the operation and claimed to be suffering respiratory problems and discomfort.

While the hospital confirmed that the surgery was successful, Lian felt he was being cheated by the doctors, Liao said.

According to her, from August to Oct. 15 last year, Lian was under treatment at Shanghai Mental Health Center, diagnosed with a persistent delusional disorder.