People visit the sunflower field during the second annual Sunflower Festival in Chilliwack, Canada, Aug. 2, 2019. Thousands of visitors stroll through the six acres of field viewing 25 varieties of sunflowers during sunflower blooming season. The festival runs from August 1 to mid September. (Photo by Liang Sen/Xinhua)

People visit the sunflower field during the second annual Sunflower Festival in Chilliwack, Canada, Aug. 2, 2019. Thousands of visitors stroll through the six acres of field viewing 25 varieties of sunflowers during sunflower blooming season. The festival runs from August 1 to mid September. (Photo by Liang Sen/Xinhua)

A visitor plays on a swing in the sunflower field during the second annual Sunflower Festival in Chilliwack, Canada, Aug. 2, 2019. Thousands of visitors stroll through the six acres of field viewing 25 varieties of sunflowers during sunflower blooming season. The festival runs from August 1 to mid September. (Photo by Liang Sen/Xinhua)

People take photos in the sunflower field during the second annual Sunflower Festival in Chilliwack, Canada, Aug. 2, 2019. Thousands of visitors stroll through the six acres of field viewing 25 varieties of sunflowers during sunflower blooming season. The festival runs from August 1 to mid September. (Photo by Liang Sen/Xinhua)