Members of a South Korean group EXID perform during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Peng Lei (L) and Pang Kuan, members of a rock band New Pants, perform during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Fans cheer during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singers Song Dongye (L) and Ma Di perform during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Members of rock band Yaksa perform during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Members of rock band Yaksa perform during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi

Singer Leah Dou performs during the Strawberry Music Festival in Xianghe County, north China's Hebei Province, April 30, 2016. (Xinhua/Xiao Xi