missions across China, with the last Jesuits—obliged to maintain allegiance to the papal rulings—finally being expelled after 1721. It was not until 1939 that the Catholic Church revisited its stance, with Pope Pius XII permitting some forms of Chinese customs; Vatican II later confirmed the new policy. 17th to 18th centuries Further waves of missionaries came to China in the Qing (or Manchu) dynasty (1644–1911) as a result of contact with foreign powers. Russian Orthodoxy was introduced in 1715 and Protestants began entering China in 1807. The Qing dynasty's Yongzheng Emperor was firmly against Christian converts among his own Manchu people. He warned them that the Manchus must follow only the Manchu way of worshipping Heaven since different peoples worshipped Heaven differently. He stated: The Lord of Heaven is Heaven itself. . . . In the empire we have a temple for honoring Heaven and sacrificing to Him. We Manchus have Tiao Tchin. The first day of every year we burn incense and paper to honor Heaven. We Manchus have our own particular rites for honoring Heaven; the Mongols, Chinese, Russians, and Europeans also have their own particular rites for honoring Heaven. I have never said that he [Urcen, a son of Sun] could not honor heaven but that everyone has his way of doing it. As a Manchu, Urcen should do it like us. 19th to 20th centuries By the 1840s China became a major destination for Protestant missionaries from Europe and the United States. Catholic missionaries, who had been banned for a time, returned a few decades later. It is difficult to determine an exact number, but historian Kathleen Lodwick estimates that some 50,000 foreigners served in mission work in China between 1809 and 1949, including both Protestants and Catholics. They encountered significant opposition from local elites, who were committed to Confucianism and resented Western ethical systems. Missionaries were often seen as part of Western imperialism. The educated gentry were afraid for their own power. The mandarins claim to power lay in the knowledge of the Chinese classics—all government officials had to pass extremely difficult tests on Confucianism. The elite currently in power feared this might be replaced by the Bible, scientific training and Western education. Indeed, the examination system was abolished in the early 20th century by reformers who admired Western models of modernization. The main goal was conversions, but they made relatively few. They were much