Three Kingdoms: I'm a Descendant of Ying Zheng, and I Destroy the Xiongnu from the Start

I transmigrated into a low-ranking county magistrate at the end of the Han dynasty, and I’m the sixteenth-generation descendant of the First Emperor? To preserve our bloodline, my ancestors’ instructions demanded that I conceal my surname and identity. But now the Xiongnu cavalry is at the city gates, slaughtering my people and building towers out of their skulls! I won’t stand for this! [Ding! Great Qin National Destiny System activated!] I paid my respects to my ancestors in the ancestral hall. “Your unworthy descendant, Ying Cheng, will reclaim the surname Ying today!” Three thousand Snow-Dragon Cavalrymen will trample across the land, while the Embroidered Uniform Guard secretly controls the realm. Zhao Yun? Mine! Xu Huang? Mine! Cai Wenji? Mine! Dong Zhuo trembled, while Cao Cao cried out, “Could this Ying Cheng be the First Emperor reborn?!” As my cavalry trampled Luoyang, I looked upon the war-ravaged realm of the Han and asked just one thing: “Valiant Qin, reclaim our land! The world has been taken back by the Ying clan!”