Teenage Zhang Bin had invited school friends around his house, but one guest brought the dangerous weapon.

Measuring 50cm, it's not known exactly how the sword penetrated 5cm deep into Zhang's forehead. However, he was lucky to be alive after doctors at a local hospital refused to operate - citing inexperience.

'Three classmates came to visit me at home and one of them brought a sword. He stood 3-4 meters away from me,' explained Zhang as he recovered in bed.

'I don't know how the sword could fly to me and stab into my head.

'I felt sharp pains and a large amount of blood streamed down.'

After being turned away by local doctors, the boy was then faced with a four-hour drive the the nearest hospital in Changsha where surgeons delicately removed the object.

The surgery chief at the hospital said: 'Luckily the knife didn't touch the arteries in the skull and key nerves, otherwise it would have been a different story.'