Baek Dong-su or Baek Dong Soo (백동수, 白東脩; 1743–1816) was a Korean martial artist and swordsman of the Suwon Baek clan. He became a folk hero when his group protected King Jeongjo from assassination attempts. He was known as the best warrior in Chosun. He is a person who firmly walked his own way despite of his low social class for he was a Seo-er(child of a concubine). Baek Dong-su or Baek Dong Soo (백동수, 白東脩; 1743–1816) was a Korean martial artist and swordsman of the Suwon Baek clan. He became a folk hero when his group protected King Jeongjo from assassination attempts. He was known as the best warrior in Chosun. He is a person who firmly walked his own way despite of his low social class for he was a Seo-er(child of a concubine).

Given the social climate of the time, it had to be taken into account that there was discrimination based on social status.In 1773, He gave up on getting an official position and leaving Seoul to live in seclusion, Go into hiding in a rural village Inje in Gangwon.