It can be said: "Thank you for your active cooperation."

Before thanking parents for their active cooperation, you can send out relevant information about festivals and tell parents that these activities are beneficial to cultivating children's feelings of home and country.

The third day of the third lunar month, also known as Shangsi Festival, is a traditional festival of the Chinese nation, with Han, Zhuang, Miao and Yao as typical. The third day of March is still a grand and grand festival in some minority areas in southwest China.