 While in the 1980s Chinese people living in North Korea enjoyed privileged access to trips abroad, today many of them have permanently moved to China.Some 50,000-70,000 ethnic Koreans living in China migrated to North Korea in the wake of the famine following Mao Zedong's Great Leap Forward and repression of ethnic minorities during the Cultural Revolution.The influx forced the North Korean government to construct refugee camps to house the immigrants.