What are three changes Mao made?

Explanation:

Leaders of China after Mao had to make a new rule called one child policy. Mao Zedong also made several changes to the Chinese language, such as switching from the Wade Giles system of Romanization to Pinyin. For this reason, Nanking is now called Nanjing on modern maps.

i really really really really really really dont know

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.