Traveling Through the Qin Dynasty: I Am Invincible by Sworn to Ying Zheng at the Beginning

**Lost in Time and Space**: Qin Ling, a geology student, accidentally fell into the Qin-Zhao battlefield at the end of the Warring States Period. With modern knowledge, he rescued the young Ying Zheng in the Battle of Changping and became sworn sworn sworn friends. From then on, a modern soul began to live a daily life with his charming ancestor. He also tidied up his little life, organized the world map, and so on. He didn't even think about whether his ancestor could bear it.