CHONGQING, Oct. 29 (Xinhua) -- After more than 20 years in downtown southwest China's Chongqing municipality as a migrant worker with no house and no stable job, Xu Shuping has finally settled.

Xu, 40, a welder at the Chongqing Gas Group Corporation Ltd., will be attending a staff training course, only open for formal employees, next month thanks to the "hukou", or household registration.

Xu got his job after he was transferred from "agricultural household" status to "non-agricultural household" status three years ago when Chongqing launched changes to its household registration system in 2010.

The goal was to turn 10 million rural migrant workers into urban citizens by 2020.

Up till now, about four million rural residents in Chongqing have obtained their city "hukou" or "non-agricultural household" status. Xu, from Anshun Village, Changshou District, Chongqing is one of them, as is his wife and 16-year-old daughter.

China's "hukou" system was set up in 1958 to control the movement of people between urban and rural areas. Household registration is tied to one's place of residence and is used to obtain access to basic welfare and public services.

The way the registration is categorized has created an urban-rural divide. People working in cities but still holding their official rural status do not enjoy the health care, education and social insurance offered to urbanites.

Chongqing's move aimed to reduce this divide and lower the threshold for rural residents to settle down in cities, said Xu Qiang, vice director of a task force set up to carry out the reform.

Under the regulations, rural workers employed in downtown areas of Chongqing for five years or in remote county seats for three years can apply to become urban citizens.

The government also offered preferential policies for those who applied for non-agricultural status. They are allowed to retain use of the land their rural home is on after they become urbanites.