The Gu family's adopted son and Gu Jianbin's nominal younger brother. He is a military officer who has reached a high position at a young age, with future achievements that would far surpass Gu Jianbin's. He arrives late at the funeral after being on an important mission and losing contact for several days. He is tall, broad-shouldered, with a stern bronze-toned face, deep-set eyes, and a resolute, steady aura. Taciturn yet upright and reliable, he picks up Gu Jianbin's wrinkled photo, restores it, and publicly offers to take care of Lin Wanxing for the rest of her life, saying what his brother owes her he will repay. His unexpected proposal completely throws Lin Wanxing's plans off course.