Children from the Nanjing Little Red Flower Art Troupe of China perform at the Alexander Theatre in Helsinki, Finland, May 21, 2019. (Xinhua/Matti Matikainen)

Children from the Nanjing Little Red Flower Art Troupe of China perform at the Alexander Theatre in Helsinki, Finland, May 21, 2019. (Xinhua/Matti Matikainen)

Children from the Nanjing Little Red Flower Art Troupe of China perform at the Alexander Theatre in Helsinki, Finland, May 21, 2019. (Xinhua/Matti Matikainen)

Children from the Nanjing Little Red Flower Art Troupe of China perform at the Alexander Theatre in Helsinki, Finland, May 21, 2019. (Xinhua/Matti Matikainen)

Children from the Nanjing Little Red Flower Art Troupe of China perform at the Alexander Theatre in Helsinki, Finland, May 21, 2019. (Xinhua/Matti Matikainen)

Children from the Nanjing Little Red Flower Art Troupe of China perform at the Alexander Theatre in Helsinki, Finland, May 21, 2019. (Xinhua/Matti Matikainen)