Passengers with a layover of at least 5.5 but less than 24 hours at Singapore Changi Airport can now embark on free tours of the city-state as the airport resumes the service after a three-year hiatus.
Source: VNExpress International,
https://e.vnexpress.net/news/travel/singapore-s-changi-airport-restarts-free-city-tours-for-transit-passengers-4591095.html
