Quang Ninh, May 30 -- An exhibition featuring Ao Dai (Vietnam's traditional long dress) through historical periods opened at the Quang Ninh Museum in Ha Long city on May 29. The event marks major anniversaries in Vietnam this year, including the 135th birth anniversary of President Ho Chi Minh (May 19, 1890-2025), 50 years since the liberation of the South and national reunification (April 30, 1975-2025), the 70th anniversary of the liberation of Quang Ninh province's mining zone (April 25, 1955-2025), and Visit Vietnam Year 2025 - Hue. Director of the Quang Ninh Museum Do Quyet Tien said that the museum and the History Museum of Hue city coordinated to organise the exhibition as a practical activity to improve the quality and effectivene...