Chinese 'White Paper'
This makes quite interesting reading on this topic.
"China's National Defense in the New Era"
it can be found at "The State Council Information Office of the People's Republic of China". the first edition is dated July 2019.
I downloaded my copy as a 51 page 'Word Document'
It sets out what China sees as 'its property' and it does challenge the US and others.
It seem to be their 'Official Party Line' on the topic.