The Chinese don't have only one class of citizens:
1) Ethnic minorities (Tibetans, Mongols, etc.) have a legally recognized status, with affirmative action policies, (some) exemption from the one-child policy, etc.
2) More importantly, the Hukou system is basically a passport/visa system inside China, and migrant workers from the countryside are pretty similar to immigrants (or worse off) in Europe or the US: they don't benefit from social services like schools (they have to send their kids back in their home province, or not have them in school, or send them to a private school), government jobs, etc. The Hukou system is also as hot a topic in China as immigration is the West.
Ethnic minorities (Tibetans, Mongols, etc.) have a legally recognized status, with affirmative action policies, (some) exemption from the one-child policy, etc.
By that standard Western countries also don't have one class of citizens.
As Multiheaded added, "Personal is Political" stuff like gender relations, etc also may belong here.