Christianity in China (calle 基督教 Jī dū jiào, or Christ religion) is a growing minority religion that comprises Protestants, Catholics, and a small number of Orthodox Christians. Although its lineage in China is not as ancient as beliefs such as Confucianism or Taoism, or comparable missionary faiths such as Mahayana Buddhism, Christianity has developed in China since at least the 7th century and has demonstrated increasing influence for over 200 years. Growth has been more significant since the loosening of restrictions on religion after the 1970s within the People's Republic. Religious practices are still often tightly controlled by government authorities. Chinese over age 18 in the PRC are permitted to be involved with officially sanctioned Christian meetings through the "Three-Self Patriotic Movement" or the "Chinese Catholic Patriotic Association". Many Chinese Christians also meet in "unregistered" house church meetings. Reports of sporadic persecution against such Christians in Mainland China have caused concern among outside observers.