German violinist Julia Fischer is seen during the opening concert of the Heidelberger Spring music festival, in Heidelberg, Germany, on March 25, 2017. The 21th Heidelberger Spring music festival kicked off here on Saturday. (Xinhua/Luo Huanhuan)
German violinist Julia Fischer is seen during the opening concert of the Heidelberger Spring music festival, in Heidelberg, Germany, on March 25, 2017. The 21th Heidelberger Spring music festival kicked off here on Saturday. (Xinhua/Luo Huanhuan)