People dance at the Exhibition of Achievements of National Economy (VDNH) in Moscow, Russia, on Aug. 2, 2020. VDNH, an exposition, museum and recreational complex in Moscow, celebrated its 81st anniversary on Aug. 1 and Aug. 2 with a whole range of festive events. (Photos: Alexander Zemlianichenko Jr/Xinhua)

People enjoy themselves at the Exhibition of Achievements of National Economy (VDNH) in Moscow, Russia, on Aug. 2, 2020. VDNH, an exposition, museum and recreational complex in Moscow, celebrated its 81st anniversary on Aug. 1 and Aug. 2 with a whole range of festive events.

People dance at the Exhibition of Achievements of National Economy (VDNH) in Moscow, Russia, on Aug. 2, 2020. VDNH, an exposition, museum and recreational complex in Moscow, celebrated its 81st anniversary on Aug. 1 and Aug. 2 with a whole range of festive events.

People are seen at the Exhibition of Achievements of National Economy (VDNH) in Moscow, Russia, on Aug. 2, 2020. VDNH, an exposition, museum and recreational complex in Moscow, celebrated its 81st anniversary on Aug. 1 and Aug. 2 with a whole range of festive events.

Artists perform at the Exhibition of Achievements of National Economy (VDNH) in Moscow, Russia, on Aug. 2, 2020. VDNH, an exposition, museum and recreational complex in Moscow, celebrated its 81st anniversary on Aug. 1 and Aug. 2 with a whole range of festive events.

Artists perform at the Exhibition of Achievements of National Economy (VDNH) in Moscow, Russia, on Aug. 2, 2020. VDNH, an exposition, museum and recreational complex in Moscow, celebrated its 81st anniversary on Aug. 1 and Aug. 2 with a whole range of festive events.