Complex sentence: Han's elder brother, Shen Chonghui (沈崇誨), had joined the Republic of China Air Force as a pilot and died in 1937 while bombing the Japanese cruiser "Izumo" during the Battle of Shanghai.
Split into simpler sentences: Han's elder brother, Shen Chonghui (沈崇誨), had joined the Republic of China Air Force as a pilot. He died in 1937 while bombing the Japanese cruiser "Izumo" during the Battle of Shanghai.