How did the rulers of the qin dynasty shape and unify china

When King of Qin was thirteen hen China's first emperor when he was 38 after the Qin had conquered all of the other Warring States and unified all of China in 221 BC.

answer; ///i do believe that the correct answer for the above is ( which states would be free and which states would have check first good

uncle sam would be tossing and turning in his grave : *)