Qin Shi Huang - First Emperor

Good day everyone. I hope to discuss with you my current research, to learn new things and to double check on some facts. There is a few things that I may need clarification on.

I've attached photos of some of the notes and research I've found. I will say, I want to know more about the assassination attempt at Qin Shi Huang (First emperor) and if indeed it was by Jing Ke. 
If there's any further stories, facts /nuggets of information that could prove useful for my notebook, please let me know. I also recall hearing that his first Prime minister had an attempt on his life as well. I'd like to know more about any attempts and also about why he was depicted as so cruel, yet his military tactics and many things laid out a great foundation for china. I want to understand also , how he was able to unify those nations and , basically, i'm in the dark about those other nations. Thank you . 

He was a great leader, but he was very selfish and evil.

Qin Shi Huang unified the six warring states with an iron fist, establishing a centralized government and promoting the rule of law and infrastructure development, laying a solid foundation for China's long-term stability. While Qin Shi Huang's harsh methods may have seemed cruel at the time, in an era of prolonged division and turmoil, his policies and reforms provided the necessary stability for national unity and development. It was precisely these powerful measures that enabled China to achieve long-term unity and prosperity.