People visit Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)

People visit Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)

People visit Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)

People visit Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)

People visit Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)

People visit Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)

A bee gathers honey from roses at Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)
  

Roses are seen at Changchun Children's Park in Changchun, northeast China's Jilin Province, June 16, 2020. (Xinhua/Lin Hong)