At the beginning of the North American summit, there were discussions about Pyongyang, Panmunjom, and Mongolia. Of these candidates, Singapore was the final choice.
First, Singapore appears to be a representative neutral country.
Singapore is a diplomatic neutral area where the United States and North Korea interact.
Two embassies are located.
The Washington Post said Singapore had diplomatic ties with North Korea, operated a diplomatic mission in North Korea, and conducted diplomatic activities smoothly in third countries in Asia.
In fact, the first summit meeting between Chinese President Hu Jintao and Ma Ying-jeou of Taiwan in 2015 was held in Singapore.