Hanoi, Aug. 14 -- With a four-day break (August 30 - September 2), this year's National Day holiday is regarded as a "golden opportunity" to accelerate tourism growth, particularly in the domestic market. A range of promotional campaigns and new tourism products have been launched to capture growing traveller demand. According to travel agencies, as early as July, the September 2 travel market has already become active. Domestic tour sales heated up day by day, especially for Hanoi, which is hosting a series of events rich in historical and cultural significance during the break, notably a large-scale parade and march marking the 80th anniversary of National Day at Ba Dinh Square. Statistics from the online travel platform Booking.com sho...