Seizing the Heir: the Seventh Prince Relied on the System to Win

He traveled through time and became a crippled prince, Yinyou. His biological mother did not favor him, and he stole his transparent son. The system is activated and the favorability level is clear at a glance. From the Empress Dowager's affection to Kangxi's sideways glance, when the nine sons competed, they discovered that the final winner was actually the seventh child who "lyed flat".