What is the origin of the little girl around the Bodhisattva?

"Guanyin Bodhisattva is surrounded by many boys and girls who have not yet achieved results. We should practice in a down-to-earth manner, experience the eight hardships of life, and realize the true meaning of practicing Buddhism from the suffering. In Buddhist terms, these boys and girls are the internal and external providers of Guanyin Bodhisattva Datura, and some of them have been proved to be bodhisattvas, but they have not yet become Buddhas; There are only ordinary people who practice with Bodhisattva, but they are not free from life and death. As a result, boys and girls have no gender, and their faces are illusory to show the innocence of Yuan God. ? "~ Master Chang Guanyin