Photo taken on July 25, 2018 shows cole flowers in Gyangze County in Xigaze, southwest China`s Tibet Autonomous Region. (Xinhua/Li He)

Aerial photo taken on July 24, 2018 shows a winding road in Tingri County in Xigaze, southwest China`s Tibet Autonomous Region. (Xinhua/Li He)

Photo taken on July 27, 2018 shows the morning scenery of a village in Kangmar County in Xigaze, southwest China`s Tibet Autonomous Region. (Xinhua/Li He)

Photo taken on July 24, 2018 shows a rainbow in Dingri County in Xigaze, southwest China`s Tibet Autonomous Region. (Xinhua/Li He)

Photo taken on July 27, 2018 shows the scenery of the Doqen Co National Wetland Park in Xigaze, southwest China`s Tibet Autonomous Region. (Xinhua/Li He)

Aerial photo taken on July 24, 2018 shows cole flowers in Sagya County in Xigaze, southwest China`s Tibet Autonomous Region. (Xinhua/Li He)

Villagers graze cattle near a field of cole flowers in Kangmar County in Xigaze, southwest China`s Tibet Autonomous Region, July 27, 2018. (Xinhua/Li He)