A good first place to start. HKUST Library's "One stop" search (library + several other databases at once)
Has current and some historical statistics. Some online information goes back as far as the 1980s For data before that, you would have to go to print (via PowerSearch for HKUST's collection).
The search allows you to try and find special reports and statistics.
This page has links to quarterly reports & surveys on new arrivals (one way permit holders). There are also links to NGOs that serve newly arrived mainland migrants.
This page shows official government material aimed at helpers, including policies. By going one level up, you will find other infomation, including "Foreign Domestic Helper Corner"
The local NGO for foreign domestic workers that SOSC 2140 - fall 2018 works with. It includes a useful page of links to other organizations
Includes reports and press releases
Use the drop-down menu for the topic of Poverty to find some possibly useful reports and data.
This is an NGO and advocacy organization. It includes a special section on newly arrived Chinese migrants: 新移民工作計劃
A local NGO that focuses on its work on serving ethnic minority Hong Kong residents and their families. Its site includes useful reserach papers and links to other NGOs serving ethnic minorities in Hong Kong.
Go to Databses -> Humanities and Social Sciences to see other available databases.
These books are about interviewing for qualitative research & oral histories, as well as designing questionaires. While you are not doing oral history or marketing in this class, some of the techniques may be useful.