70-year-old former commander, also known as Old Master Gu. A hale and spirited war veteran with bright, sharp eyes. He is Su Yin's grandfather's old comrade and the one who arranged the childhood engagement between Su Yin and his grandson Gu Cheng'an. He is strict, authoritative, and values honor and promises. He has five children, four of whom are surviving. He disciplined Hou Jianguo with a wooden stick after learning the boy slandered his granddaughter Gu Chenghui.
