On May 12, ShannXi: seven children killed by knife, more injured. This is the Sixth similar tragedy since March 23.

On March 23, Nanping, Fujian: one man entered an elementary school and killed eight children by knife within one minute, indured other five.

After Nanping's tragedy, there were four more similar incidents. The last two was on April 28 and  April 30. The one on April 28, 28 children sent to hospital, parents were not allowed to see their kids. Witness said at least eight dead, but official statement says all are alive.

The Chinese report on today's tragedy:

http://peacehall.com/news/gb/china/2010/05/201005121057.shtml