1. Ministry of Commerce and Ministry of Public Security, Guanyu zili kouliang hukou renyuan nongzhuanfei banli huliang guanxi youguan wenti de tongzhi (Circular on Procedures of Non-agricultural Hukou Transfer and Grain Supply for Those Who “Self-supply” Their Grain), issued on 13 05 1991.
2. Sing Too Daily, 7 12 1998, p. B8
3. Chan Kam Wing , Cities With Invisible Walls
4. Shenzhen Municipality Government, Shenzhenshi huji zhidu gaige zanxing guiding (Interim Stipulations for Reforming the Household Registration System), issued on 24 11 1995.
5. Feng Wang , “The breakdown of a great wall,” p. 159.