Tang: At the beginning, Empress Zhangsun mistook him as the eldest son.

Li Yu had almost starved to death when he crossed the Great Tang. He was saved by a young man, Li Wang.

The two of them had similar birthmarks and were like old friends at first sight, so they became sworn brothers.

However, Li Wang had an incurable disease and passed away early. He only left a jade pendant, hoping that Li Yu would find his parents to fulfill his wish.

On this day, Li Yu prepared to travel the world to find Li Wang’s parents, hoping to show filial piety to his brother.

Unexpectedly, a middle-aged man came with a critically ill wife to borrow the ground for treatment.

By chance, Li Yu saved his wife, who happened to be Li Wang’s long-lost parents.

Because of the birthmark on his arm and his belongings, Li Yu was mistaken by the middle-aged couple as his eldest son.

And that couple was the current emperor and empress. The prosperous Chang ’an also began from then on…