Violent Qin Emperor's Master

As soon as Fang Kuan traveled to the Qin Kingdom, he almost fell into a box. The Queen Mother gave him poisonous wine, and he almost had his body taken away from him. He is the eldest son of the emperor, but the lingering poison is difficult to clean up. He only has three years to live. Where should he go for the rest of his life? The most ruthless emperor's family, the tears of the biological mother, and the helpless cries of the brothers lingered in my heart for a long time. The road to revenge is destined to be difficult, but I have to go on it.