China witnessed another disturbing school attack, Friday-- this time involving a kindergarten class.

A farmer walked into a school in Shandong province's Weifang city, hitting children with a hammer.

Most of the kids were only 4-years-old. Five were injured and a teacher was also struck.

The ordeal ended with the man setting himself on fire, burning to death.

The incident comes came one day after an attack on another kindergarten class where 28 children were stabbed.

Attacks were also reported April 28, April 12 and two others in March.

The chinese government is ramping up security at schools nationwide.