As for utlities, they should always be free. I have never worked at any university where I had to pay part of the electricity bill, or for gas and water.

Small beer. Forget it, only 200 RMB per month max. Your monthly pay is what counts. The difference between 4000 and 5000 is of greater importance. The overall package on offer is the main thing, and the number of clock hours you have to put in to 'earn' it.