The suspect, a 23-year-old surnamed Kong, entered the kindergarten by climbing a wall before spraying victims with sodium hydroxide, said police authorities in Kaiyuan city, Yunnan province.
Police said Kong had intended to take revenge on society after growing up with divorced parents and then encountering difficulties in work and life.
According to source,
The attack took place on Monday at 3:35 pm (0735 GMT), Kaiyuan Public Security Bureau said on their Twitter-like Weibo account.
Local reports claimed the violence happened in Kaiyuan Dongcheng Kindergarten.
Some 51 children and three teachers were admitted to hospital for treatment, two with ‘severe symptoms’.
Police arrested Kong less than an hour after the assault.
‘Because his parents divorced during his childhood, the lack of family warmth resulted in psychological distortion,’ said police, adding that Zhang’s work and life were unsatisfactory as well.