How we gonna feed our people? By importing or by growing it on farms on the Island?
Unfortunately we will have to import most of our food, probably with the exception of fish and other aqua-products. Even if we divert 1/3rd of the land for agriculture (~800 acres, and I don't think that much will be available for farming), it will only produce less than 3,000 tonnes of cereals. Not enough to feed tens of thousands of people.
Hong Kong, a major Asian economy, imports food to the tune of almost 4.4 per cent of its GDP.
We will be fine if we have a strong economy. Also we don't need to plan food for a lot of people for starters.