國際到/離港 ?

香港係中國既特別行政區，雙方居民往來仍有限制，好似香港人返大陸要申請回鄉咭；內地居民來港亦要到公安簽註。

兩地制度不同，出入境都要憑有效證件經入境處╱邊防╱海關檢查，有如外國人出入境做法，所以往香港航班係係國際線，那邊才有邊檢同海關。

It has nothing to do with "One country, two systems" and historical issue.

The reason is simple - domestic terminal can't handle flight from/to Hong Kong.

Domestic terminal does not equip with Customs and Immigration facilities.

History issue. they were international flights before the "handover". and "one country two systems" issue.

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香港是国际大都会来的。不是广州和上海。我看澳门应该也是吧。
**** Shanghai is also an international city.

2011-01-09 15:45:12 補充：
Domestic terminal does not equip with Customs and Immigration facilities.
**** Then why need Custom/Immigration facilities?
think about the logic behind.

2011-01-09 15:45:27 補充：
also, the new terminal of Beijing Airport was completed couple yrs ago. If it is not a "one-country-two-systems" / historical issue, this should have been incorp in the design.

2011-01-09 15:45:34 補充：
International terminals can always be converted for domestic flight (e.g. Perth Airport once had domestic flight in the international terminal)

一国两制。方便与世界各地联系吧
香港是国际大都会来的。不是广州和上海。我看澳门应该也是吧。