Shen Xiaoqian took Yu Wenye's hand and played happily in the park.

"Uncle, I want to play that," said Shen Xiaoqian, releasing Yu Wenye's hand and running to an outdoor sports equipment not far away to start playing.

"Thousands of thousands, you slow down," Yu Wenye said worriedly, for fear that the naughty child would just play and forget to pay attention to safety.

Yu Wenye stood aside and watched thousands of people playing on these outdoor sports equipment. He played happily and occasionally chatted with the children around him.

Suddenly, Yuwenye's phone rang. Yuwenye took out her cell phone and looked at it. It was her friend who called....