Tourists are seen amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province, Aug. 13, 2019. (Xinhua/Zhang Nan)

Aerial photo taken on Aug. 13, 2019 shows tourists amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province. (Xinhua/Zhang Nan)

Aerial photo taken on Aug. 13, 2019 shows tourists amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province. (Xinhua/Zhang Nan)

Tourists are seen amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province, Aug. 13, 2019. (Xinhua/Zhang Nan)

Tourists are seen amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province, Aug. 13, 2019. (Xinhua/Zhang Nan)

Tourists are seen amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province, Aug. 13, 2019. (Xinhua/Zhang Nan)

Tourists are seen amid flowers at Dabei Village of Jiutai District in Changchun, capital city of northeast China's Jilin Province, Aug. 13, 2019. (Xinhua/Zhang Nan)