Gu Ran's second senior brother, referred to as Dr. Lan and Second Brother. He is the most renowned pharmacologist in the country and a leading expert in complex and rare diseases. He developed an antidote for a toxic gas weapon in a warzone overseas within half a month. He is arriving in Nancheng and will stay for five hours. Gu Ran needs to meet him to obtain Qingdu Pills to suppress the poison in her body.
