I've stayed in a plethora of budget hotels in China, and nearly all have asked for a deposit of at least 200元. Also, I'd advise you to get a corner room, since the walls are usually very thin in these places, and having one at the far end of the hall might cut down on the decibels a bit. Also, if it's the budget type of place that is located above a bar and below karaoke, well...good luck with that! However, you may get lucky and find that some of those "motels" offer computers in the room- look out for 电脑 to be sure.

Also, don't be alarmed when, upon check out, someone has to run up to your room to make sure you didn't break/drink anything. It's not as if this is an uncommon occurrence, but I just mention it because it's not usually done too efficiently.