An initial investigation found the sinkhole was caused by heavy rainfall over a number of days, which had led to the flooding of an underground basement, the report said.
Road collapses often occur in mainland cities during rainy days because of the poor quality of the infrastructure projects, experts said.
Two weeks ago, four cars were swallowed up after a three-metre-deep sinkhole, stretching five metres across and four metres wide, appeared in Ruijin in Jiangxi province, the news portal 163.com reported.
