Here are the actual documents:
Announcement:
http://www.nhc.gov.cn/xcs/gzzcwj/202...fc94e0f0.shtml
Q&A document:
http://www.nhc.gov.cn/xcs/fkdt/20221...de079561.shtml
Doesn't say anything about travel from outside of the country.
For travel inside the country, from the first doc (lazy google translate)
The eighth is to ensure the normal operation of society and basic medical services. Non-high-risk areas shall not restrict the flow of people, and shall not suspend work, production, or business.
Which is being interpreted as "non-high risk districts cannot block people from entering or leaving"