The Thirteen Strikes of Chongming

Set during the late Song and early Yuan dynasties in the 13th century, this story follows the protagonist from a naive youth entering the world to cultivate, through the vicissitudes of life, to a hermit in the mountains and seas where he creates the Thirteen Strikes of Chongming blade technique. Ultimately, he reemerges into the martial world and founds the Wuji Sect. The core positioning is a popular, plot-driven wuxia work that blends epic historical backdrop, suspense and thriller, human nature exploration, and national resistance against Japanese pirates. — Description from novelcodex.org