Moreover, Shenzhen–Hong Kong is treated as separate urban areas, principally because labor movement between the two is limited, with the former within China and the latter a special administrative region of China.
此外，深圳-香港被视为独立的城市地区，主要是因为两者之间的劳工流动是受限的，前者在中国大陆，后者是中国的特别行政区。