According to local press, the perpetrator is from Mizhi County, is male and under 18, and was formerly a student at the school he attacked before dropping out.
Two days later, on February 13, eight people were killed in a knife attack on a crowd in China's restive Xinjiang region, including three assailants who were gunned down by police.
The victims are believed to be aged between 12 and 15.
The incident took place after 6 pm on Friday evening.
The suspect was identified as Zhao Moumou of Mizhi County. Schools have increased security with cameras and gates in the aftermath of such attacks, according to the Times.
Shocking videos and images were posted online. "Hurry up, hurry up, call for help!" a woman shouted in one video.
AFP could not immediately verify the authenticity of the video.
Attacks have also targeted schoolchildren in the past.
In January 2017, for example, 11 kindergarten students were wounded by a man with a kitchen knife.
The man had entered the school in the afternoon, claiming that he was there to pick up his son.
Seven school children in China were stabbed to death and 12 others were injured as they were leaving school. In 2010, almost 20 children were killed in knife attacks outside school gates, casting light on the medical system's ability to diagnose and treat mental illness.