Great Tang: Qin Qiong Exposes My Illegitimate Birth from the Start

In the sixth year of Zhenguan, Qin Shou transmigrates to the Great Tang and becomes an illegitimate son whom Duke of Yi Qin Qiong despises. By a stroke of luck, he earns great military honors in Lingzhou, only to nearly get himself killed for flirting with Princess Changle, who has just been promised in marriage to Zhangsun Chong. Fortunately, that year Li Shimin has a change of heart: three thousand women who had been forced into the palace are released, and four hundred death-row prisoners are allowed to return home. Qin Shou, who knows his history, escapes his predicament and unlocks the Great Tang Enfeoffment System. He plans to rely on his peerless (thick-skinned) martial (shameless) arts and brilliant schemes… keeping a low profile and building up his strength. To his utter surprise, the System's first mission is to go talk with Princess Changle about life and ideals. On that dark and windy night, Li Shimin is in Princess Changle's residence, ready to chop him into a thousand pieces! At the critical moment, Qin Shou completes the mission and earns one chance to hear someone's inner thoughts, discovering that Li Shimin is terribly short on money… And so he embarks on an irreversible path of terrible ideas…