Manga Doupo Cangqiong

From Desperate Scanner: In a country where there is no magic. A country where the strong sets the rules, and the weak must obey. A land full of tempting treasures and beauty, but also filled with unforeseen danger. Xiao Yan, who has shown talents that no one has seen for decades, suddenly lost everything three years ago: his strength, his reputation and his promise to his mother. What sorcery caused him to lose all his strength? And why did his fiancée suddenly appear?