Only friends know what song it is.

Constellation code. Lyrics excerpt: Only friends know that we should always take good care of them. A set of secret words let's dance happily together. As long as we have confidence, our dreams will come true. This is the little secret, the magical twelve stars, scattered all over the world, waiting for our password to be determined. As long as you believe, you will find the Gemini in your heart. The song "Constellation Code" was written by Henry Lai and composed by Xu Shaorong.