Wu Zixu slipping out through Zhaoguan Pass by night is the story editions attach to this lot. In the Spring and Autumn period, King Ping of Chu killed Wu Zixu's father and elder brother and hunted Wu himself. He fled east, hiding by day and moving by night, until he reached Zhaoguan, the border pass guarding the way to the state of Wu. Legend says worry turned his hair white in a single night, so the guards no longer knew his face. In the later novel of the Eastern Zhou states, a recluse named Dongao Gong shelters him and helps him through. He reached Wu safely and years later led its armies against Chu. Carrying a tiger over a mountain is the image line, terror every step, and a skilled helper met on the road is what saves him. Danger survived with help makes this a middle lot.