19, the left-behind children in Anxian Banfang community are immersed in joy. Twenty big brothers and sisters from Southwest University for Nationalities who came to the board house to volunteer work played games with them, making their summer vacation life more colorful.

In the morning, volunteers came to the board house community to introduce the knowledge of various nationalities and local customs to the children through their national costumes. During the games and explanations, the children not only learned about 56 ethnic groups in China, but also spent a happy day with the volunteers. Minority volunteers also form a one-on-one helping pair with left-behind children, so that left-behind children can feel the sweetness and warmth of their families. Chen Wanyi, a 5-year-old child, sang "Only Mom is Good in the World" for the brothers and sisters of the volunteers to express their gratitude and love. The tender singing made the volunteers wet their eyes.