A fight broke out on a Chinese train after a man refused to give up his seat to someone who had already booked it.

The video, filmed on G1329 high-speed rail from Shanghai to Changsha on August 13, shows a man named Kuang boarding on a train and seeing another man named Zhang sitting on his seat.

Kuang talked to Zhang and he also asked the train staff for help.

However, Zhang refused to give the seat up, stood up and started to beat Kuang.

Since Zhang still insisted to stay on the seat when the police arrived he was taken to the police station after the train stopped.

Police have detained Zhang for five days, according to reports.

The video was provided by local media with permission.