Wu C, Inglis C
Asian Pac Migr J. 1992;1(3-4):601-21. doi: 10.1177/011719689200100310.
"Illegal migration from China is contrasted to that from Vietnam to highlight Hong Kong's unique place in such flows.... The key difference in Hong Kong's effectiveness at stemming these two illegal migrant streams has been bilateral cooperation, which has been achieved with China but lacking in the case of Vietnam.... This paper seeks to outline the dimensions of the illegal migration problem from China and Indochina, the different attitudes taken by the Hong Kong authorities to the problems, and some theoretical issues for consideration."