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.

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

which empire had the greatest influence on the history and cultural development of russia?