There are "some" benefits to PR/Green Card in China. I read somewhere just to name a few:
1. No need to do yearly visa. Can stay long term.
2. Can buy house/apartment. Those city with restriction like BJ, Shanghai, GZ, the rule last time was foreigner can buy one and need to work/stay in China minimum of one year. Not sure nowadays. For cities with no restriction, maybe can buy more.
3. Get loan from bank.
4. Apply for plate number those cities with plate restriction.
I remember there is an article on these in China Daily.
Of course, in reality, it will vary from places to places.