Waking up in a fourteen-year-old body, Li Zexuan a modern-day engineering otaku unexpectedly found himself in the Great Tang Dynasty during Emperor Taizong’s reign!

When modern technology, lazy ideals, and 21st-century culture confronts Confucian orthodoxy the era of engineering has begun.

Though Li Zexuan only wants to stay at home, hold his lady, play cards, sleep, read novels, and live a life of leisure.

Destiny thinks otherwise with great knowledge comes great responsibility and also a great deal of entanglement with the Emperor.

The figure of the Armada seems to be still riding the wind and waves in the Atlantic Ocean, and the gold of South America still seems to flow in continuously. As Alfonso from the Bourbon family returns to the Royal Palace of Madrid where he was born, the story begins here...