Blues singer Kenny Smith performs during the yearly Chicago Blues Festival in Chicago, the United States, on June 7, 2019. The 36th Chicago Blues Festival kicked off Friday at Millennium Park in downtown Chicago. The three-day music festival is free and open to visitors. (Xinhua/Wang Ping)

Jazz guitarist and singer Guy King performs during the yearly Chicago Blues Festival in Chicago, the United States, on June 7, 2019. The 36th Chicago Blues Festival kicked off Friday at Millennium Park in downtown Chicago. The three-day music festival is free and open to visitors. (Xinhua/Wang Ping)

Blues singer and guitarist Grady Champion performs during the yearly Chicago Blues Festival in Chicago, the United States, on June 7, 2019. The 36th Chicago Blues Festival kicked off Friday at Millennium Park in downtown Chicago. The three-day music festival is free and open to visitors. (Xinhua/Wang Ping)

Blues guitarist Chris Cain performs during the yearly Chicago Blues Festival in Chicago, the United States, on June 7, 2019. The 36th Chicago Blues Festival kicked off Friday at Millennium Park in downtown Chicago. The three-day music festival is free and open to visitors. (Xinhua/Wang Ping)

Blues singer Karen Wolfe performs during the yearly Chicago Blues Festival in Chicago, the United States, on June 7, 2019. The 36th Chicago Blues Festival kicked off Friday at Millennium Park in downtown Chicago. The three-day music festival is free and open to visitors. (Xinhua/Wang Ping)

Electric blues harmonica player and bandleader Charlie Musselwhite performs during the yearly Chicago Blues Festival in Chicago, the United States, on June 7, 2019. The 36th Chicago Blues Festival kicked off Friday at Millennium Park in downtown Chicago. The three-day music festival is free and open to visitors. (Xinhua/Wang Ping)