LINFEN, June 4, 2016 (Xinhua) -- Colorful lights are displayed at an LED light festival in Linfen City, north China's Shanxi Province, June 3, 2016. (Xinhua/Su Qiang)

LINFEN, June 4, 2016 (Xinhua) -- Colorful lights are displayed at an LED light festival in Linfen City, north China's Shanxi Province, June 3, 2016. (Xinhua/Su Qiang)

LINFEN, June 4, 2016 (Xinhua) -- People view colorful lights at an LED light festival in Linfen City, north China's Shanxi Province, June 3, 2016. (Xinhua/Su Qiang)

LINFEN, June 4, 2016 (Xinhua) -- Colorful lights forming the shape of a peacock are displayed at an LED light festival in Linfen City, north China's Shanxi Province, June 3, 2016. (Xinhua/Su Qiang)

LINFEN, June 4, 2016 (Xinhua) -- Colorful lights are displayed at an LED light festival in Linfen City, north China's Shanxi Province, June 3, 2016. (Xinhua/Su Qiang)

LINFEN, June 4, 2016 (Xinhua) -- Colorful lights are displayed at an LED light festival in Linfen City, north China's Shanxi Province, June 3, 2016. (Xinhua/Su Qiang)