Armed police, armored vehicles, and checkpoints are removed during ambassador's visit.
The policy shift is an 'experiment' by Chinese authorities.
Thousands of government cadres are sent to a Tibetan prefecture to bolster Chinese rule.
She says Chinese authorities want to prevent her from speaking up on conditions in Tibet.
A rights group says 20,000 personnel sent to rural areas in Tibet are spying on villagers.
Chinese authorities confine family members to their home.
They are sentenced in secret as China cracks down on Tibetan assertions of national identity.
A protest last year had called for the right to use Tibetan as the language of instruction in the schools.
The number of Tibetan self-immolations rises to 120.
Tibet's spiritual leader makes the plea after recent deadly violence.
He had staged a public protest calling for freedom for Tibet.
The two monks had organized a funeral service for a self-immolator.