The wreckage of the Boeing 737 is stuck diagonally on the ice sheet in eastern Siberia. The broken wings are covered in frost, like a frozen iron bird. When former border scout Cao Jiawei climbed out of the twisted porthole, his left forearm was still embedded with broken glass, but his 6-year-old daughter Cao Xiaoya was tightly protected in his arms. Xiaoya had blood oozing from her forehead and her breathing had a faint whistle. She was the only survivor of the snowstorm crash. The cold wind of minus 35 degrees can instantly take away the body temperature. There is no reference point on the ice sheet, only the endless white thorns that make people blind. Cao Jiawei relied on the instincts of her military career to dismantle the seat frame to make a windproof wall, used a first aid kit to treat her daughter's wounds, and dug out half a box of compressed biscuits and a damaged radio from the wreckage. He knew that the extreme cold, hunger, possible ice crevasses, and his daughter's injuries that could worsen at any time were all the knives hanging above his head. During the day, he searched for melting water on the ice sheet, set up simple traps to catch snow hares, and used the metal sheets of the fuselage wreckage to reflect sunlight to send signals; at night, he wrapped Xiaoya in his arms wrapped in a survival blanket that was torn in half, and listened to his daughter calling "Mom" in her dream. The memory would always float back to three years ago - before his wife died, she put Xiaoya's hand into his palm and said "Don't let her be wronged" will also drift back to the winter nights at the border guard post. He once lurked in the snow for three days and three nights with a piece of compressed biscuit.
