After the Catastrophe, I Became Qin Shihuang

[Urban high martial arts + amnesia + Qin Shihuang + no heroine + no system + decisive killing] "I, I don't remember who I am, my name should be... Ning Shiqiu." "But... I remember that I had a sister, Ning Shiyue, but I can't remember her clearly. I can't remember her appearance or her personality. Where are you?" …. Many years later, a vision came, the Guixu Sect rose, and all the nations were around! Daxia is at stake! When Ning Shiqiu stood resolutely in front of Da Xia, facing all these malicious intentions. "I, Ning Shiqiu, the First Emperor of Qin, hereby swear an oath!" "I am here to protect the health of all the people of Great Xia and live forever!" "When I die, I will use my dragon body to burn my lamp of Great Xia, which will never be extinguished!" "Anyone who offends our Daxia, no matter how far away... Will be punished!!!" … Until he found his sister, he discovered...