In 2017 the Chinese government implemented population controls for Beijing and Shanghai to fight what it called the "big city disease" which includes congestion, pollution, and shortages of education and health care services. From this policy, Beijing's population declined by 20,000 from 2016 to 2017. Some low-income people are being forcibly removed from the city as both legal and illegal housing is being demolished in some high-density residential neighborhoods. The population is being redistributed to Jing-Jin-Ji and Xiong'an New Area, the transfer to the latter expected to include 300,000-500,000 people working in government research, universities, and corporate headquarters.