Yang Jingyu joined the revolution at the age of 21. In early 1940, he was besieged by the Japanese army and was seriously injured. He could not chew tree bark, so he could only swallow the cotton in his cotton-padded clothes with ice and snow to satisfy his hunger. When the Japanese army failed to persuade them to surrender, they fired random shots. Yang Jingyu, who was only 35 years old, died heroically. The cruel Japanese army cut open his body. When they saw that there were only weeds and cotton wadding in his stomach, the invaders, who were overwhelmed by the anti-Japanese coalition forces led by Yang Jingyu, were all stunned. In the dense forests of Changbai Mountain in the ice and snow, the force that supported Yang Jingyu in fighting the enemy was his love for the motherland.