Answer :

The Civil Service System changed China, because only people has to take a very difficult test to get a high government job, and the chosen people were mostly intellects.

Answer:

The civil service system change during China's government to stop the practice of having only members from royal family members and other aristocrats run the government.

Emperor Han Wudi introduced the imperial Civil service examination the examination made it so ordinary people with talent, ability and dynamic talent could work in government and it is a common examination for all not only for the aristocrats or the people who have connections.