Suspects?accused?of trafficking women?for marriage are escorted to Baotou in Inner Mongolia autonomous region in this September 30, 2014 file phto. Chinese police arrested 31 people on suspicion of trafficking women because they had held 14 people, 11 of them from Myanmar, Xinhua reported on Monday.[Photo/Xinhua]?

BEIJING - Chinese authorities in the northern region of Inner Mongolia arrested 31 people on suspicion of trafficking women because they had held 14 people, 11 of them from Myanmar,?Xinhua reported?on Monday.

Five of the non-Chinese victims were younger than 18 and were handed to Myanmar police after a three-month investigation into the gang, which ensnared the women by offering them tours and jobs.

The victims were then sold as wives in rural China for as little as 50,000 yuan ($8,142).

China's gender imbalance, the result of its one-child policy and illicit abortion of girl babies because of a traditional preference for boys, has led to a huge surplus of single men. The latest census showed 118 newborn males for every 100 females.

In September, state media reported that Chinese police would clamp down on websites that sell group tours to enable men to meet "foreign brides" in Southeast Asian countries, as the practice leads to human trafficking and prostitution.