The Chinese have claimed that most of the population of Tibet at that time were serfs, bound to land owned by lamas. This claim has been challenged by other researchers (see serfdom in Tibet controversy). Any attempt at land reform or the redistribution of wealth would have proved unpopular with the established landowners. The Seventeen Point Agreement was put into effect only in Tibet proper; ergo, eastern Kham and Amdo, being outside the administration of the government of Tibet, were treated like territory belonging to any other Chinese province, with land reform implemented in full. As a result, a rebellion broke out in these regions in June 1956. The rebellion eventually spread to Lhasa, but was crushed by 1959. The 14th Dalai Lama and other government principals fled to exile in India.