when you become a transit port for logistics, you will become a trading place for bulk goods. For example, although many futures transactions in Chinese mainland are in China, the delivery place of goods is mostly in Singapore. In particular, most of the bulk goods listed on the China Futures Exchange (such as wheat and soybeans) are delivered in Singapore. Ten years ago, Singapore's annual futures delivery alone exceeded China's annual GDP. Therefore, Singapore is not only the world's largest logistics center, but also the world's financial center and trade center.
Because in order to handle their own goods, banks all over the world need to set up branches in Singapore. In a country with a population of less than 5 million, there are hundreds of foreign banks, and hundreds of thousands of employees are employed in banks. The industries that serve banks need more people. Singapore can't even do it if it is underdeveloped.