Which is a method used by the first ruler of the qin dynasty to control his empire

The Hongwu Emperor expected everyone to obey his rule[34][35] and was infamous for killing many people during his purges.[36] His tortures included flaying and slow slicing.[37][38][39] One of his generals, Chang Yuchun, carried out massacres in some places [citation needed] in Shandong and Hunan provinces to take revenge against people who resisted his army. [40][41][42] As time went on, the Hongwu Emperor became increasingly fearful of rebellions and coups, even going so far as to order the execution of those of his advisers who dared criticise him. [43] He was also said to have ordered the massacre of several thousand people living in Nanjing after having heard one talked about him without respect. [44][45][46] In 1380, after much killing, a lightning bolt struck his palace and he stopped the massacres for some time as he was afraid divine forces would punish him. [47]