If you actually bought songs from the iTunes Store they are yours to keep permanently. If you downloaded songs to listen to online under your Apple Music subscription they will be unplayable if you stop the subscription. Furthermore purchased songs can be transferred to any iPod: songs from Apple Music can only be downloaded directly onto an iPod Touch (not synced from your Mac) and cannot be transferred to any other iPod as they have no internet connection.
......when the trial ends and I don't renew the plan?
WMS,
There is nothing to "renew"! If you do not proactively cancel, it will start billing you when the 3 moths ends.
If that is not what you want, make sure to cancel the auto-renewal at least 24 hours before the 3 months is up:
No: purchasing songs and Apple Music are separate. How recently did you buy the songs? When I've rented films on my Apple TV I've noticed that it can take several days before the invoice turns up, so that may be the reason.
I bought the 2 songs but when I checked my account, the money not deducted.. i wonder is it because of the 3months free trial? Did the trial allow me to buy songs without deducting my card's money?
What the difference between the songs that I've downloaded and bought while using the 3 months free trial?