People walk in an alley of gingko trees in Tianshui City, northwest China's Gansu Province, Nov. 14, 2019. (Xinhua/Guo Gang)

Girls take a selfie in an alley of gingko trees in Tianshui City, northwest China's Gansu Province, Nov. 14, 2019. (Xinhua/Guo Gang)

An illuminated gingko tree is seen in Tianshui City, northwest China's Gansu Province, Nov. 14, 2019. (Xinhua/Guo Gang)