1. Scientific explanation: In the second "Dark Forest", Tanya was attacked by the Trisolarans with "flying fish", causing all electronic equipment on Tanya to fail, including Tanya's heart Pacemaker, Tanya was sent to the hospital in a coma, but the doctor could not do any treatment for Tanya because all the medical equipment was destroyed, and she could only rely on her own willpower to maintain life. In the third part of " In "Death is Immortal", Tanya wakes up and finds that she has turned white hair. This is because Tanya suffered great mental stress and physical damage during the coma, which caused Tanya's melanocytes to undergo apoptosis, thus causing Tanya's Hair loses color.
2. Literary metaphor: Literary metaphor is based on the theme and character creation in the novel. Tanya finally turns white hair, which not only reflects the suffering and sacrifice that Tanya has experienced, but also symbolizes The human spirit and values ??that Tanya represents.
3. Tanya is a strong, brave, wise, just, loyal, and sacrificial character. Tanya always adheres to her belief and sense of responsibility for earth civilization and the future of mankind. Tanya is not afraid of the Trisolarans. Despite the threats and temptations, and not succumbing to division and betrayal among the people on earth, Tanya used her actions to prove that human beings can resist external aggression and maintain their dignity and freedom.