A 21-year-old man was pulled out alive Wednesday from the big landslide in southern China.Tian Zeming had been buried in piles of debrisfor 67 hours, said Chinese officials.It took rescuers three hours to reach him.Tian was weak and dehydratedwhen rescue workers found him, Chinese officials said.He told them his name and reported that another person was buried near him,Associated Press reported.But medical staff and rescue workers said the second person did not survive.Chinese officials said more than 70 people are missing after Sunday's landslide in Shenzhen.The landslide buried buildings under mud and construction debris.The BBC reported that at least four bodies had been recovered by Wednesday afternoon.Chinese officials said 5,000 rescuers were working to find the missing people.Doctors said that Tian, a migrant worker from Chongqing,suffered many broken bones and other injuries.They said his condition improved after three-hours of surgery.The landslide occurred when a man-made mountain of earthand construction waste collapsed following heavy rains.The Chinese government said it is investigating the disaster.Government controlled news media reportedthe District Government near the landslide sitehad reported safety concerns months before Sunday's disaster.