Oh my God! I sincerely hope you will be able to get over this terrible experience. I know how you must feel because I've been there as well, feeling screwed over and left out in the cold(literally). I also wonder if that was a real policeman at the Beijing airport, he shouldn't just randomly tell you what you can and cannot take. Pants and toys are things that you should have every right to bring back with you. Did you ask to see his ID? In some developing countries there will be paid thugs who dress up like cops and also real cops who are just walking around looking for a bribe.