Regression of the Yong Clan Heir is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Yong Hwarin, debilitated by illness and weakness as the heir to the Tianzhong clan, ultimately gave up the path of martial arts and lived as a merchant after marrying into another family. Carrying his regrets until the time he met his end, he unexpectedly travels back to the past he thought he would never revisit...! Returning to the time of his lowest point, he swears to his shattered heart that his fate will be reborn through his own hands.