Aerial photo taken on June 24, 2019 shows cole flowers in terraced fields in Jishishan County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province. (Photos: Xinhua)

Aerial photo taken on June 24, 2019 shows cole flowers in terraced fields in Jishishan County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province.

Aerial photo taken on June 24, 2019 shows cole flowers in terraced fields in Jishishan County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province.

Aerial photo taken on June 24, 2019 shows cole flowers in terraced fields in Jishishan County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province.

Aerial photo taken on June 24, 2019 shows cole flowers in terraced fields in Jishishan County of Linxia Hui Autonomous Prefecture, northwest China's Gansu Province.