Nay, I bet you play the game just fine. The PLA really have problems in smaller game, due to the overcosting of the T-99 and the infantry. Over at www.evocommand.com we had a huge discussion over the points of these two model.
Some felt they were ok, but only in a large game where those points do not make a huge difference. But, we all agreed in smaller games it was a problem, mainly due to lack of troop choices at the time. That said many of us attempted to breakdown the point cost the best we could and all agreed the PLA infantry just didn't breakdown well. There are some really wonky point cost in the fireteams. I and others broke them down to the troop and found that 175 pts per squad is about right. PLA gunners were 30pts, mg gunners about 35pts, riflemen about 10pts plus the first team gets additional point per fireteam leader after the first (note we also figured there was a point system that rounded down points which led to some odd looking cost). 1st fireteam 70 pts, 2nd fireteam 50 pts, 3rd fireteam 55 pts.
Like I said no really big deal, except in smaller games. What really is the problem is the wonky costing on the 2nd and 3rd team cost. As for the tank well that one is really hard to figure, but I'll bet it should fall in the range of 300pts.