The Legendary Siblings (1999)

Xiao Yu Er and Hua Wuque, twin sons of adventurer Jiang Feng and the slave girl Hua Yuenu, are separated at birth when their parents are killed. Xiao Yu'er, initially in the care of Jiang Feng's sworn brother Yan Nantian, was lost to the notorious Ten Villains, who raised the child and made him their disciple. Hua Wuque was raised in the secret Yi Hua Palace by his parents' enemy Yao Yue, who taught him martial arts with the evil intentions to make the twins kill each other. However, after surviving several adventures together, the two expert martial artists developed a friendship despite being unaware of their relationship and becoming entangled in several love triangles with women they met. The story's climax ensues as Yao Yue forces Hua Wuque to challenge Xiao Yu Er to a fight to the death.