The first commercial flight by seaplane from Tuan Chau Island to Co To Island in the northern province of Quang Ninh was conducted on July 9, marking the first service of its kind connecting two islands in Vietnam.
Source: VNExpress International,
https://e.vnexpress.net/news/travel/first-commercial-seaplane-flight-to-co-to-island-conducted-4627111.html
