Hong Kong Chinese Medical Association (1920–1922, forerunner of the Hong Kong Medical Association), and a secondary school classmate of Sun Yat-sen in the Government Central College (currently known as Queen's College) in Hong Kong. Wan and Sun graduated from secondary school around 1886. Doctor Wan was also the chairman of the board of a Christian newspaper called Great Light Newspaper (大光報) that was distributed in Hong Kong and China. Sun and Wan practiced Western Medicine together in a joint clinic. The father-in-law of Wan was Au Fung-Chi (1847–1914), the secretary of the Hong Kong Department of Chinese Affairs, manager of Kwong Wah Hospital for its 1911 opening, and an elder of To Tsai Church (renamed Hop Yat Church since 1926), which was founded by the London Missionary Society in 1888 and was the church of Sun Yat-sen. National and social change: the war against Japan and the Chinese Civil War (1925–1949) During World War II, China was devastated by the Second Sino-Japanese War which countered a Japanese invasion, and by the Chinese Civil War which resulted in the separation of Taiwan from mainland China. In this period the Chinese Christian churches and organizations had their first experience with autonomy from the Western structures of the missionary church organizations. Some scholars suggest this helped lay the foundation for the independent denominations and churches of the post-war period and the eventual development of the Three-Self Church and the Catholic Patriotic Church. At the same time the intense war period hampered the rebuilding and development of the churches. Since 1949: The People's Republic The People's Republic of China (PRC) was declared October 1, 1949 by the Chinese Communist Party (CCP) led by Mao Zedong, while the Republic of China led by the Kuomintang maintained its government on the island of Taiwan. The historian Daniel Bays comments that it was "not surprising that this new government, like the emperors of several dynasties of the last millennium, evinced an insistence on monitoring religious life and requiring all religions, for example, to register their venues and leadership personnel with a government office." Christian missionaries left in what was described by Phyllis Thompson of the China Inland Mission as a "reluctant exodus". The Chinese Protestant church entered the communist era having made significant progress toward self-support and self-government. While the Chinese Communist Party was hostile to religion in general, it did not seek to systematically destroy religion