Who are the people behind the oppression of Tibet?

Tibetan buildings, local businesses and religious traditions under threat from shopping mall
China attempts to bully UK over Tibet
A new report has highlighted the oppression faced by Tibetan Buddhists living under Chinese occupation.
“This movement has done great things and its greatest achievements are yet to come.”
Protest in same location as mother-of-four died in March
Graduates demonstrate against corruption and discrimination in the jobs market
Julia Gillard has raised the subject of Tibet with China's President Xi Jinping.
Reported to be in poor health following repeated torture
Mining disaster shows how China exploits Tibet with migrant workers
Traditional prayers too much for Chinese occupiers.
The man in charge of the occupation of Tibet visits just days after national Human Rights Day
After Tibetan’s self-immolation, Chinese military move in and put area under strict surveillance
Kalkyi, 30, self-immolated on Sunday afternoon.
Senior politicians urge China to end repressive policies
Internet cut in parts of Tibet; mobile phone sweep leads to arrests
Dolma Kyab arrested after he refused to say family discord behind self-immolation