Zhou Wu and Sang Jing met when they were young, and had an ambiguous relationship after high school. Later, due to business problems, the Zhou family and the Sang family became rivals. Sang Jing faced the destruction of his family and the culprit Zhou Wu, who was almost suicidal. Zhou Wu couldn't bear to see Sang Jing's painful life again, so he joined the army and stayed away. Later, he had his legs amputated while protecting his family and the country.
Purpose: Don't let misunderstandings become too deep to change