:You really have probelm reading, and your knowledge toward the english term mainland Chian is questionable. Mainland China is a geopolitical term. Besides, you misrepresnted the things i said. I said geography is a reason which "apart from other reasons" (i.e. existing legal, political system that existed long before the 1997) resulted in the use of the term. But somehow u read it as "purely geographical". You pushed so hard to add PRC's name into the 1st sentence, the only reason u did this is so u can make it sounds like Hong Kong is the same as China, and ignore HK's facts on autonomy. What is the different between Neidi and Dalu in English anyway? Show me a reference in Oxford Dictionary, could u? Those words don't even exist in English Oxford dictionary.