NANTONG, April 16, 2016 (Xinhua) -- Colorful lights decorate a park during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Tourists view the colorful lights during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Colorful lights decorate a park during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Tourists view the colorful lights during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Tourists view the colorful lights during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Tourists view the colorful lights during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Tourists view the colorful lights during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)

NANTONG, April 16, 2016 (Xinhua) -- Colorful lights decorate a park during a light festival in Nantong City, east China's Jiangsu Province, April 15, 2016. (Xinhua/Xu Congjun)