I went to the PSB this morning to do my second 1 month visa extension and asked if I could do more of those later on.

I was told that I can extend my visa for 1 month each time for a total period of maximum half the period of the visa I entered China with, in my case 180 days!

That's a very good news to me but also leaves me skeptical, has anybody else heard or actually did that before? Would be nice to have a confirmation here.