From what I heard 3 spotter went spotting in PEK last week, the holding point 36L is still open, but they have removed all the dirt/grass/bushes to the right hand side of it, and make way of 12 stands for cargo plane and the concrete is already finish there. They told me it is now probably the last couple weeks to still ok to get in. there are 2 more gates built before the road leads to the holding point spot, but gates are open so far. (one can imagine if gates are closed, then the spot is no more accessible, this being the main issue)
For the 1st time, I also heard they reported police hassel spotter there, but may be this is due to some misunderstanding. Normally they are used to the photographer and lens.
I haven't been back since March this yr, but I believe much have changed except traffic still interesting. Also spot for afternoon on 18R (landing rwy) is very good, you simply walk towards left from 36L holding point, youre slightly elevated and stand on top of a ditch looking down. There are lots of clear days but when there is no wind, it can be hazey, October is typically a bad month, smog, fog and haze. But when it is too windy, sandstorm are possible too. Good LUCK