Recently, dozens of aunts and grandpas were laughing and working out in a fitness field in Zhangdian District, Zibo City, Shandong Province. The haha ​​laughter enlivened the cold winter atmosphere.

A 67-year-old Uncle Zheng said that laughing is too comfortable and can also improve lung capacity. They come to exercise every day.

(Edited by Lu Huiqian)

Editor in charge: [Ye Pan]