Fei dao you jian fei dao (TV series)

The little girl (Cai Yue also known as Yue Shen) decides to live with her father - he is known to be the best swordsman there is. Xiao Li Fei Dao challenges him to a duel, but before that duel the little girls father was blinded and subsequently killed in the duel with Xiao Li Fei Dao. When Cai Yue found out that her father died (before he went to fight Xiao Li Fei Dao he promised his daughter that he would come back.) Cai Yue was angered by the death of her father and wanted revenge. Xiao Li Fei Dao found out that his son was Li Huai (a beggar). So he decided to give Li Huai the secrets to the famous kung fu - "Xiao Li Fei Dao". Li Huai took that and his mothers will and decided to leave the Li house (he did not want to be in that family.) Years later Cai Yue thought that she was good enough to fight Xiao Li Fei Dao (Li Huai's dad). She went to his house and challenged him. - IMDb