The migrant workers put on their hats with smiling children's greetings.

Original title: the children of migrant workers came to Beijing for Children's Day.

Children write blessings on their father's helmet at a construction site in Beijing on May 31.

On the occasion of International Children's Day's arrival on June 1st, China Construction first Bureau Beijing Company invited more than 20 children of migrant workers from Shandong, Sichuan and other places to come to Beijing to reunite with their parents.

Photo taken by Xinhua News Agency reporter Li Wen