How to get to the bud cage from Singapore Changi Airport?

There are two passenger terminals at the entrance of Singapore Changi Airport. You can take a bus to downtown under two buildings. Among them, 24 roads lead to Hongmao Bridge, passing through Buluo, Immobile and Shilonggang. You can ask local residents casually. Mandarin is one of the official languages in Singapore, so communication is not a problem. You should prepare some coins, because you have to pay for it yourself according to the station when you get on the bus. It's the first time to take the bus. I'm very uncomfortable and will be very anxious. It is best to ask the local people for help in advance. As the saying goes, Singaporeans are all living Lei Feng. You can enjoy the tropical scenery along the way by bus, but it is not as fast as the subway.