Tourists enjoy themselves in a verbena field in Gaopo Township of Guiyang, capital of southwest China's Guizhou Province, Aug. 14, 2020. (Photo by Zhang Hui/Xinhua)

Tourists enjoy themselves in a verbena field in Gaopo Township of Guiyang, capital of southwest China's Guizhou Province, Aug. 14, 2020. (Photo by Zhang Hui/Xinhua)

A tourist enjoys herself in a verbena field in Gaopo Township of Guiyang, capital of southwest China's Guizhou Province, Aug. 14, 2020. (Photo by Zhang Hui/Xinhua)

Tourists enjoy themselves in a verbena field in Gaopo Township of Guiyang, capital of southwest China's Guizhou Province, Aug. 14, 2020. (Photo by Zhang Hui/Xinhua)