I and my friend have Mi Fit app. We get friends there. Now I have some questions about it.

1. Why i can't see friend's training (bycicle or another)?
2. Is there any way to hide information that i don't want to share with other. For example, i don't want someone knows about my wake-up or go-sleep time.
3. Can I turn off vibration of my band by my friend?

Thank you.