Great Tang: Li Er, Are You Telling Me What to Do?

[Great Tang Dynasty] [Sign-In System] [Farming] [Genius] [Emperor] Li Yun transmigrates to the Great Tang Dynasty, and assumes he's an idiot. Fortunately, he awakens a sign-in System. By signing in at different locations, he can obtain all sorts of rewards.

"Ding! Congratulations, Host, your sign-in was successful. Reward: mastery of Wing Chun!"

"Ding! Congratulations, Host, your sign-in was successful. Reward: potato and sweet potato seeds!"

"Ding! Congratulations, Host, your sign-in was successful. Reward: recipes for soy sauce, perfume, and soap!"

"Ding! Congratulations, Host, your sign-in was successful. Reward: AK-47 blueprints..."

Before long, more and more people discover that Li Yun is an unparalleled genius. And the mighty wheel of history in the Great Tang Dynasty is changed because of him!