Level 8 or above.
The difficulty level is above average. The highest note is G or A. But when taking an exam, it doesn’t mean that the more difficult it is, the higher the score will be. But you can really complete the details of the song well. What’s more, the songs you choose should try to reflect your strengths and avoid the weaknesses. If your breath is not good, don’t choose songs that are too high or have too many long notes. If you don't like high notes, don't choose songs that are too loud. If you don't feel good emotionally, don't choose songs that are too lyrical.