On Friday in Harbin, capital Heilongjiang province, a young man with tuberculosis and a bad back entered the No 1 Hospital attached to the Harbin Medical University.

It was 4 pm and the doctors were at their desks doing paper work when the man rushed into their room and attacked them with a knife.

Wang Hao, a 28-year-old medical intern, was killed and three doctors were seriously injured. A man surnamed Li, 17, was arrested. Although the incident is still being investigated, Li confessed that he was unhappy with the treatment he had received at the hospital.