點解香港Ctrip 同 國內Ctrip 不同價錢？ 點解香港人用國內Ctrip要加錢先俾入住？

1-2. This is usually resulted by POS (point of sales) and currency exchange.

a. Point of Sales - Travel industries determines prices based on the market. So not all deals/prices are available everywhere. Some are restrictive geographically.

b. Currency - Travel industries do not usually market rate to determine currency exchange rate. So it is common that difference in currency can impact the prices.