Four of the five injured school children in a stabbing attack in southeast China's Fujian Province Tuesday, which left eight dead, became conscious Thursday, local authorities said.

School returns to normally operation after knife attack.

The four were in a relatively stable condition but still faced uncertainties and were all under intensive care, said Liu Bin, an official with the health bureau of Nanping City, where the bloodshed occurred.

Zheng Minsheng, a former community doctor in the city, stabbed 13 children at the entrance of a primary school Tuesday morning in Nanping when crowds of students were arriving, leaving eight dead and five injured.

One senior doctor and several chest surgeons arrived in Nanping from Beijing Wednesday to treat the children.

The Procuratorate of Yanping District in Nanping City approved the arrest of Zheng Wednesday afternoon, on charges of intentional homicide, said Ye Xianjin, director of the Yanping District procuratorate office Wednesday.

Zheng committed the attacks as he felt frustrated after breaking up with his girlfriend last year. He also said he found life meaningless, according to Xu Jingping, deputy head of the city's public security bureau.