Depends on what sources you are talking about.
Umm in 1911 the last dynasty the Qing (Ching) became the republic of China
Answer: Thomas Woodrow Wilson was an American politician and academic who served as the 28th president of the United States from 1913 to 1921. A member of the Democratic Party, Wilson served as the president of Princeton University and as the 34th governor of New Jersey before winning the 1912 presidential election. Warren Gamaliel Harding was the 29th president of the United States, serving from March 4, 1921 until his death. A member of the Republican Party, he was one of the most popular U.S. presidents to that point.
Explanation:
Answer: Because it would cause lives and money.
Explanation:
it's because the Golden Age was with prosperity and peace so the Middle Kingdom obviously had that and so every person in the Middle Kingdom lived in peace and harmony.