based

I would suggest to buy the tangzu waner. It's the new 20$ budget king, it almost the same tuning as the Zero except with better treble extension.

According to the graphs, the chu has more 3-5khz treble, but most reviewers think that both the chu and the zero have the same amount of upper treble (8-20khz) treble extension. I'm talking about the really high frequencies, the 4-6khz harshness in the chu (as I can see in the graph) is probably what caused the "too much treble" phenomenon.

Staging: Yes. Close to my head. That's all I can really say. I don't know what type of staging this is, but it can certainly immerse me in the music if the track is well mastered.

This would expand my vocabulary and make my capabilities to never get straight to the point boundless. New horizons to be explored.