So whats the big political message?
1. China takes over Hong Kong in 1997,
2. The Chinese government decreed that Hong Kong would remain unchanged (i.e., not shifting from its self-governed capitalist lifestyle) for fifty years, meaning until the year 2046.
3. Room 2046 has bad/good memories and death;
4. He moves to Room 2047
5. the father finally relents to his Chinese daughter marrying a Japanese....