Datang: Only by resisting the decree can we become stronger

Traveling through the Zhenguan period of the Tang Dynasty, I got a cheating system: only by resisting the decree can I become stronger.
This is tantamount to dancing on the tip of a knife, probing on the verge of death.
However, to everyone's surprise, no matter how he tried to die, Li Shimin and Empress Changsun doted on him in every possible way and obeyed everything.
The reason, even the protagonist himself does not know.
He was actually the first poor lost child born to Li Shimin and his eldest grandson...
Tags: historical system through the Tang Dynasty