The Tibetan Center for Human Rights and Democracy says China has begun a massive patriotic education campaign in Lithang.
The rights group says in the first week of September, the Chinese government summoned the leaders of townships and monasteries in and around Lithang to begin the campaign.
The group said officials then summoned people from the Lithang Monastery to receive political education.
The Center said Chinese officials told the people that pre-1959 Tibetan aristocrats and officials subjected commoners to oppression, torture and servitude.
According to the Center, the people were then told how the Chinese government has developed and improved the living standards of the Tibetan people.
The Center also announced that police raided the home of a monk and beat and tortured him. The group also said police seized the homes of monks who had no connection with political activities.
The Center expressed concern about the scale of human rights violations in Lithang and appealed to the Chinese government to respect the rights of the Tibetan people living in the region.
Beijing has yet to respond to the Center's statement.