I always think it's better to go back to the original source material, so here's the white paper mentioned: http://english.gov.cn/archive/white_paper/2019/07/24/content...
The basic message seems to be:
• As China and other countries develop, the world is shifting from unipolar model to a multipolar one.
• The US is doubling down on unipolarity.
• China is doubling down on multipolarity.