I'm not sure, but try prying it open, ignoring any snapping sounds that may occur. No, of course you should seek advice concerning this. I haven't seen any thread here discussing how to take the player apart, but you may want to do a quick search on Google.
Don't you ever try to open your meizu with a knife. I wanted to open it up with it to get the dust out of the player and I ended up with one corner slightly damaged. The thing is that the plastic used is very soft so you have to use something that will not cause it to bend. There are a lot of tools used for opening iPods so you might want to try these. I think the best way to open it is to start from the usb port side because there is a little gap between the front and the betal back.