Firefighters rescued a girl trapped in an only 20-centimetre-wide wall gap after falling out of a flat during the house viewing with her mum in southeastern China's Taihe.

In the clip, shot on July 14, a fireman named Liu Zhichun, tied by a rope, lowered down into the narrow gap to approach the trapped girl.

After Liu attached a safety rope to the girl, other firefighters pulled the girl up.

The girl reportedly visited an under-construction building with her mum and accidentally fell out of the building.

She was sent to hospital immediately. Luckily, she only suffered several scratches to her body.