Photo taken on June 14, 2020 shows an installation art illuminated at night in the Zhengding ancient town in Shijiazhuang, north China's Hebei Province. (Photo by Xu Jianyuan/Xinhua)

Photo taken on June 14, 2020 shows an installation art illuminated at night in the Zhengding ancient town in Shijiazhuang, north China's Hebei Province. (Photo by Xu Jianyuan/Xinhua)

Photo taken on June 14, 2020 shows an installation art illuminated at night in the Zhengding ancient town in Shijiazhuang, north China's Hebei Province. (Photo by Xu Jianyuan/Xinhua)

Aerial photo taken on June 14, 2020 shows a night view of the Zhengding ancient town in Shijiazhuang, north China's Hebei Province. (Photo by Xu Jianyuan/Xinhua)

Aerial photo taken on June 14, 2020 shows a night view of the Zhengding ancient town in Shijiazhuang, north China's Hebei Province. (Photo by Xu Jianyuan/Xinhua)

Aerial photo taken on June 14, 2020 shows a night view of the Zhengding ancient town in Shijiazhuang, north China's Hebei Province. (Photo by Xu Jianyuan/Xinhua)