How high is the highest note of fairy tales sung by Liang Guang?

The online soundtrack is not tuned. The climax of fairy tale songs is tuned twice, the original tune is #F, the first tune becomes a key, and the second key is b key. The highest note of fairy tale songs should be "I believe we will be like in fairy tales" in the last scene, and the highest note is B flat, just like the sea.