China's Ministry of Public Security on Friday handed over 10 children trafficked from Vietnam to its Vietnamese counterpart in a border city in the Guangxi Zhuang autonomous region.
At a ceremony in Fangchenggang city, Liu Ancheng, head of the ministry's criminal investigation department, urged the two countries to boost cooperation to stop human trafficking.
The abducted baby boys were in poor health and suffered from pneumonia and other diseases when they were rescued by Chinese police on July 15, 2011, according to a notice released on the ministry's website.
One infant was unconscious because the human traffickers gave him sleeping pills to stop him from crying, it said.
The children - from 10 days old to seven months old when they were rescued - received medical treatment and promptly recovered, it said.
Chinese police informed their Vietnamese counterparts of the children's situation and asked them to check their identities and find their parents - partly the reason why the children were handed over more than a year after being rescued.
Before the handover on Friday, some of the children were living in a welfare institution, while others were with foster families in Fangchenggang.
Police from Guangxi and Guangdong also arrested 43 suspects, including 10 from Vietnam, in the joint action.
In pictures: Henan construction site collapse kills 7