Er, sure, whatever. I don't know much about HK in particular, but official designations of "city" boundaries are often pretty arbitrary, and can be downright m

Er, sure, whatever. I don't know much about HK in particular, but official designations of "city" boundaries are often pretty arbitrary, and can be downright misleading (e.g. don't reflect the distribution of population/commerce/transportation), so I dunno exactly where to draw the line... When in doubt it seems better to include more information. [Tokyo "the city" is much larger than HK "the region", but also includes enormous sparsely populated areas... and on a practical level, the entire Tokyo-Kawasaki-Yokohama area is really just one humungous city, with a completely different shape than anything official... deciding where to draw the line is difficult, and depends a lot on what your end goal is.]