Great Tang: I Become an Imperial Son-in-Law from the Start, and Li Shimin Comes Begging for Grain

Modern young man Qin Mingfeng transmigrates to the Zhenguan era and saves a princess from drowning, never realizing his wife is a noble daughter of the Tang imperial family. Using his modern knowledge, he stockpiles grain, manages floods, makes soap, and launches a lottery. With one hand, he steadies the realm through natural disasters and human calamities; with the other, he stirs up a storm in the imperial court. Disguised as a commoner, Li Shimin grows more astonished the more he sees: his rural son-in-law can predict changes in the heavens and earth, and even take on the Five Great Clans and win? When his identity is finally revealed, the entire court is stunned. The greatest imperial son-in-law was right there among the common folk!