What does it mean to say that goodness can help Luan invite immortals?

"Fu Luan", also known as "Fu Luan", is a divination method of Taoism in China, also known as Fu Ji, Fu Luan, Waving Luan, Falling Pen, Inviting Immortals, Buzigu and Jia Luan. In Fu Ying, someone needs to play a role possessed by a god. This kind of person is called Luan Sheng or Yi Shen. The gods will possess themselves and write some handwriting to convey their ideas. In this way, believers communicate with the gods and understand their meaning.