Not sure about red note, but tiktok used to log all available Bluetooth decide and used to send it to their servers.

It was the major argument I heard when Indian govt banned tiktok. Not in the media, but in the policy advisory circles.

I’m guessing red note would do the same given the chance. My point being, you might be okay with your data being with China, you might be putting others data as well. Not discouraging you to use it, just be aware of the consequences.

I am fairly sure it’s GitS, but I could be wrong