The 2021 National Hot Air Balloon Open Championships and Hulunbuir Grassland air show in Hulunbuir, Inner Mongolia autonomous region, was held from Friday to Sunday. [Photo by Sun Xuan/For chinadaily.com.cn] 

About 200 pilots, coaches and referees from across China took part in the 2021 National Hot Air Balloon Open Championships and Hulunbuir Grassland air show in Hulunbuir, Inner Mongolia autonomous region, from Friday to Sunday. 

The 2021 National Hot Air Balloon Open Championships and Hulunbuir Grassland air show in Hulunbuir, Inner Mongolia autonomous region, was held from Friday to Sunday. [Photo by Sun Xuan/For chinadaily.com.cn]

About 100 aircraft were either used or on display. 

The three-day event also included five air shows involving air trikes, powered paragliders and large model aircraft, together with a music carnival.

The 2021 National Hot Air Balloon Open Championships and Hulunbuir Grassland air show in Hulunbuir, Inner Mongolia autonomous region, was held from Friday to Sunday. [Photo by Sun Xuan/For chinadaily.com.cn]