Zhao Dahai is one of the six recalled veteran soldiers receiving treatment at the military hospital. He is over thirty years old and initially skeptical about being treated by Gu Siqing due to her young appearance. However, after listening to her detailed explanations and seeing the rehabilitation plans, he gained confidence in her abilities. He noticed that Gu Siqing resembled the wife of one of his former superiors from another unit, a couple who had been deeply in love and had a daughter who went missing years ago. He dismissed the thought as unlikely since his former superior was already quite old. He has a wife and is married. He ultimately decided to focus on his recovery and fully cooperate with Gu Siqing's treatment.
