One interpretation is that, as I said earlier, maybe they see people in Hong Kong and Macau as Chinese, Hun Chinese, and Tibetans as not Chinese. There lies the contradiction. On the one hand, the official policy and statements are that Tibetans are part of the family. We are brothers and sisters; we are the same. On the other hand, they grant one constitutional system to Hong Kong and Macau, but yet deny it to Tibetans. It's one thing to say you are part of the family and it's another thing that you are denied a similar right.
There is an element of what I call Hun chauvinism in that sense. There is discrimination towards Tibetan people for sure.