The Chinese Government has enacted a systematic program of cultural and physical genocide against the people of Tibet. The Chinese Government is regularly listed as the worst violator of human rights worldwide by groups like Asia Watch, Amnesty International, and even the US state department, for widespread policies of torture, forced sterilization, forced prison labor, and sales of live prisonser's organs. Easy things you can do to get China's preferred trading status revoked to encourage them to improve their human rights record.
Businesses DO respond to consumer preferences.
Big business won't lift a finger against genocide, never has. But ten years ago you could have said the same thing about recyclable packaging. It's been slow to happen, but now you can buy L.L. Bean fleece jackets made out of recycled plastic, and some mugs, and more is coming. It happened because businesses knew that consumers wanted enviro-friendly products. Just let them know you want Tibetan friendly products, and China will be on its knees tomorrow.