What did early Chinese rulers established by conquering and uniting kingdoms under the rule of one emperor

The early Chinese rulers established a centralized imperial state by conquering and uniting kingdoms under the rule of one emperor. This period is commonly referred to as the Qin Dynasty, which was founded by Emperor Qin Shi Huang in 221 BCE. The establishment of a centralized state allowed for greater control over governance, administration, and the implementation of standardized laws and policies across the entire empire. Additionally, it facilitated the diffusion and assimilation of Chinese culture, language, and traditions throughout the vast territories under their rule.