Student membership is accepted based on what CSF or CJSF advisers and school principals tell us about the level of the courses a student completes. In the past, applications to the CSF and CJSF were not distributed to special-education students. Wright middle schools - the two junior high schools in the district where students can join the CJSF - have about 272 special-education students with minor learning disabilities, dyslexia and processing difficulties.
None of those cities have one kind of language. People in Shenzhen communicate by mandarin, cause its preferential policies have attracted people from various parts of China since 1990s. Local people in or near Guangzhou speak Cantonese while most of newcomers speaks mandarin. It depends on various districts.
In Hong Kong and Macau, Cantonese serves as one of their official languages. It is also spoken amongst overseas Chinese in Southeast Asia (most notably in Vietnam and Malaysia, as well as in Singapore and Cambodia to a lesser extent) and throughout the Western World.