Who is Tang Sheng-chih from The Rape of Nanking and what is their importance?

As the Chinese military leader left in charge of Nanking, Tang was woefully unprepared. Many believe Tang's appointment was simply to make it appear the government of China was defending the capitol, but he still fought with honor. Left without communications, air support, or the support of his government, Tang fought a brave battle to keep the city. When the Chinese failed to surrender, the Japanese bombarded the city for three days. As Tang sent countless telegrams to Chiang, he received in response only the order to abandon his army and retreat. Tang argued to remain and hold the city, but Chiang was insistent and, under pressure and duress, Tang abandoned his forces.