Warring States: Am I Actually the Adoptive Father of the Founders of Qin and Han?

[Not danmei, with a female lead.]

260 BC. The Battle of Changping: the Qin army buried more than four hundred thousand Zhao soldiers alive.

Amid a mountain of corpses and a sea of blood, an eighteen-year-old boy was sent back to Handan.

My adoptive sister married a foreign hostage, and my nephew was born three months after the battle. They're waiting for me to name him.

This time, Lian Po cannot leave, Li Mu cannot die, and Handan cannot fall.

The state of Zhao is under my command.