A Chinese man has broken his own record by standing naked in sub-zero Siberian winter conditions for four hours.

Jin Songhao, a 48-year-old man from China's north-eastern Heilongjiang province, broke his record in the provincial capital of Harbin.

The Xinhua news agency reported that he stood in a "scenic spot" and that the temperature dropped to -29C.

Jin broke his previous record of three hours and 46 minutes, which he set in 2000.