Over 40 foreign art troupes from 31 countries of five continents will participate in Hue Festival 2010 in the central province of Thua Thien - Hue from June 5-13 with the theme “Cultural Heritage with Integration and Development†towards the 1000th anniversary of Thang Long – Hanoi, the 50th anniversary of sister cities of Hanoi – Hue – Saigon.