Under the influence of the May Fourth Movement, the pioneers of modern astronomy fought for the advancement of astronomical research and for the popularization of astronomical knowledge. On October 30, 1922, the Chinese Astronomical Society (CAS) was founded in Beijing. Its offices were located in the Beijing Ancient Observatory (Gu guanxiang tai), established in the 13th century, where observational instruments erected by the Jesuits in the 17th and 18th centuries are still in place today. In 1932 the society's headquarters was moved to the Ast…