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68-year-old Losang Quzhen (L) is taught to use electric cooker by her daughter at Kesum Village of Nedong County, southwest China's Tibet Autonomous Region, March 23, 2009. Since the Chinese government launched democratic reform in 1959 in Tibet to end the feudal serfdom system and liberate serfs and slaves, Losang Quzhen, once was a serf, has been leading a happy life and now her family's net income exceeds 100,000 RMB (about 14,637 US dollars) per year. [Xinhua]