Photo taken on Aug. 13, 2019 shows blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province. (Xinhua/Fan Peishen)

Aerial photo taken on Aug. 13, 2019 shows blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province. (Xinhua/Fan Peishen)

A drone flies over blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province, Aug. 13, 2019. (Xinhua/Nie Jianjiang)

Aerial photo taken on Aug. 13, 2019 shows blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province. (Xinhua/Fan Peishen)

Photo taken with a mobile phone on Aug. 13, 2019 shows blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province. (Xinhua/Fan Peishen)

Photo taken on Aug. 13, 2019 shows wind turbines amid blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province. (Xinhua/Nie Jianjiang)

Photo taken on Aug. 13, 2019 shows blooming sunflowers in Sitan Township of Jingtai County in Baiyin, northwest China's Gansu Province. (Xinhua/Fan Peishen)