Doctor 'sold newborn baby boy to human traffickers' in China after telling mother her son was too ill to survive Obstetrician Zhang Lin has been arrested in Shaanxi province Allegedly sold the baby to human traffickers for £3,000 Police found the boy after his mother Dong Wan became suspicious Officials investigating at least seven similar cases in the region By Becky Evans A doctor is accused of selling a newborn baby boy to human traffickers after telling his mother he would not survive. Obstetrician Zhang Lin allegedly told Dong Wan, 31, that her son was born with severe health problems and would soon die. She is accused of persuading the mother to sign the baby over to the hospital before selling the boy to traffickers for £3,000 ($4,600). Dong Wan's baby son (pictured) was sold to human traffickers in China after she was allegedly told by doctor Zhang Lin that he was born with severe health problems and would not survive The baby's heartbroken father Lai Guofeng (left in both pictures) and mother Dong Wan (right in both pictures) became suspicious after doctors said their son was too ill to live and called police Police in Shaanxi province say the doctor has now been arrested and fear the sale may be the tip of the iceberg. Officers are investigating at least seven similar cases in the region. The healthy baby boy was tracked down by investigators after Dong became suspicious. She has now been reunited with her son in Fuping. The mother said: 'I was told the baby would not survive and the best thing for me would be to let the hospital take care of it so I did.' Dong Wan said she was told that it was in the baby's best interests to let the hospital take care of him The baby's father Lai Guofeng holds up his son's clothes and a relative sobs over a picture of the boy After signing the documents at The Fuping County Maternal and Child Health Care Hospital Dong changed her mind and begged her husband, Lai Guofeng, to call the police. The baby was tracked down hundreds of miles away in neighbouring Henan province where the original traffickers had sold him on for a profit. Police investigators say Zhang and two suspected accomplices are under arrest. Local deputy director Chen Jainfeng said: 'The suspects told us where the baby was and with the help of local police we found the child. The baby is undergoing medical tests and is on his way home. Zhang Lin, an obstetrician at The Fuping County Maternal and ChildHealth Care Hospital (pictured), has been arrested and police say they are investigating a further seven similar cases