Separately, a lift carrying workers at a residential building being built in Changsha, Hunan province, crashed to the ground at around 7:30am, killing at least 17 and seriously injuring another, Xinhua said.
   
China's construction industry has been hit by a string of deadly accidents in the past months, including the collapse of a half-built subway tunnel in November that killed at least 17.
   
Officials have vowed to improve work safety, but industrial and mining accidents continue to kill thousands each year.