https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/78/78.pdf
https://www.project-syndicate.org/commentary/china-hong-kong-return-by-chris-patten-2017-06
https://www.brookings.edu/wp-content/uploads/2020/11/Future-U.S.-policy-toward-China-v8.pdf