long Jianfeng was surprised and said, "you can infer all this. I also know the refraction principle of light. How can I infer it?"

Hua Jieyu laughed and said, "this is my skill. You think everyone is as stupid as you."

long Jianfeng knew that Hua Jieyu was proud that she had the upper hand and smiled: "I think if you can find out the source of white light, there must be other people who can find out the source of white light."

Hua Jieyu nodded: "I think so. Maybe someone has inferred that the source of white light is in that valley, but do you think they will spread...