Teacher Sun Wakang dies in China after throat slit by student whose phone was confiscated A student in China has allegedly killed his teacher in revenge for confiscating his mobile phone. Picture: Brad Newman A CHINESE student has slit his teacher's throat in retaliation for having his mobile phone confiscated. The student, named only as Lei in news reports out of China, was caught playing with his phone during a chemistry class, the Daily Mail reports. His teacher Sun Wakang, 32, took the phone from Lei but returned it at the end of the day. The following day Lei visited Mr Sun's classroom and slit his throat from behind while he sat marking papers. A colleague at the Fuzhou school was alerted to the drama by Mr Sun's screams but the teacher died at the scene before an ambulance arrived. Lei subsequently turned himself in to Shanghai police after confession on the phone via the local emergency number. The events took place just four days after China's Teacher's Day, on which students honour their teachers. Mr Sun had taught chemistry at the prestigious Linchuan No 2 Middle School for five years.