People play piano by walking down the stairs at a Tube station

A set of piano stairs has appeared in a Tube station in central China's Henan Province and it makes different sounds when people step on them - just like an instrument.

The interesting video, filmed by a local resident at Convention Centre Station in Zhengzhou on Friday, shows people being surprised by the special function of the stairs.

According to news reports, the 26-step stairs were opened to the public on Thursday along with a new entrance to the station.