Photo taken on July 24, 2019 shows the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province. (Xinhua/Zhang Long)

Photo taken on July 24, 2019 shows the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province. (Xinhua/Zhang Long)

A bee collects honey on the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province, July 24, 2019. (Xinhua/Zhang Long)

Tourists take photos at the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province, July 24, 2019. (Xinhua/Zhang Long)

Photo taken on July 24, 2019 shows the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province. (Xinhua/Lian Yi)

Photo taken on July 24, 2019 shows the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province. (Xinhua/Lian Yi)

A man takes photos of the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province, July 24, 2019. (Xinhua/Zou Yu)

People visit the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province, July 24, 2019. (Xinhua/Lian Yi)

People visit the cole flower fields in Menyuan Hui Autonomous County, northwest China's Qinghai Province, July 24, 2019. (Xinhua/Zhang Long)