Complex sentence: Wu Kung-i then moved the family headquarters to Hong Kong in 1948, his younger sister Wu Ying-hua and her husband, Ma Yueh-liang (Ma Yueliang, 馬岳樑, 1901-1999), staying behind to manage the original Shanghai school.
Split into simpler sentences: Wu Kung-i then moved the family headquarters to Hong Kong in 1948. His younger sister Wu Ying-hua and her husband, Ma Yueh-liang (Ma Yueliang, 馬岳樑, 1901-1999), stayed behind to manage the original Shanghai school.