I've read one more article about Tibet and it's strugle for independence by Vsevolod Ovchinnikov, dating 2007. And it expresses absolutely different opinion) He, as he was in Tibet twice - in 1955 and 1990, confirms that the situation changed absolutely. The life span rised twice, slavery was replased by farming and lots of schools appeared. The Chinese are working there mosetly as teachers and doctors. So, this point of view was very important for me.