If you are planning a visit to Ho Chi Minh City during the Reunification Day and May Day holidays (April 30-May 1), here is a list of luxury rooftop hotels allowing guests to watch fireworks displays on the Saigon River.
Source: VNExpress International,
https://e.vnexpress.net/photo/places/7-rooftop-hotels-in-hcmc-to-enjoy-holiday-fireworks-4596467.html