Lobsang Sangay, who was elected in 2011 to a new position of prime minister in exile after the Dalai Lama gave up political duties, appealed to China for new talks on the grievances that have triggered a wave of self-immolations.
On a visit to Washington, Sangay said that the exiled government based in Dharamshala, India, was "not challenging China's sovereignty or territorial integrity" through its repeated calls for greater autonomy.
"That, we think, is a moderate, reasonable solution which is a win-win proposition both for the Chinese government and the Tibetan people."
China's constitution grants Tibet autonomy.
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Sangay expressed hope that Tibetans would assume decision-making positions in the region -- notably party secretary -- and said he did not oppose the control of China's ruling Communists.
"We don't challenge, or ask for, an overthrow of the Communist Party. We don't question or challenge the present structure of the ruling party," he said.
China says it has brought development to Tibet. It has questioned the sincerity of the government in exile and the Dalai Lama, Tibet's world-revered spiritual leader who fled to India in 1959, accusing them of secretly supporting separatism and violence.