The small hotel rooms

Finally I check in my hotel tonight.The room is very clean but it's very small. I booked a double room, but it's smaller than the double room in China. My friends said that it's common in HK.Hong Kong's hotels graded according to the order below:

1. HOTEL
2. GUEST HOUSE
3. LODGE
4. HOSTEL

My hotel's name is "Bishop Lei International House",not bad. Oh I made a mistake,the room is not a double room, it's standard room.The rate is $600 per night.