You can read at:
Language and identity of African community workers in Hong Kong
Bodomo, Adams B. 2010. The African trading community in Guangzhou: An emerging
bridge for Africa–China relations. China Quarterly 203: 693-707.
Bodomo, Adams B. 2012. Africans in China: A Sociocultural Study and Its Implications on Africa-China Relations. Cambria Press.
Chan Ki Yeung Katherine, Cassy Chau Ka Yi, Holly Wong Ho Wing and Elaine Wong Yuen Shan. 2013. African community in Hong Kong. LCOM3001 Cultural dimensions of language and communication project, School of English, The University of Hong Kong. http://lcom3001african.wix.com/african-community
Matthews, Gordon. 2011. Ghetto at the Center of the World: Chungking Mansions, Hong Kong. Hong Kong University Press.