This is a movement to advocate for the freedom of Tibet from Chinese rule. It is a nonviolent campaign that seeks to end the Chinese occupation of Tibet and restore the rights of the Tibetan people. The movement has been active since the 1950s and has gained international support from many countries and organizations.
From Wikipedia
The Tibetan independence movement is the political movement advocating for the reversal of the 1950 annexation of Tibet by the People's Republic of China, and the separation and independence of Greater Tibet from China.