http://www.chinese-embassy.org.uk/eng/ambassador/t1720992.htm
https://www.eia.gov/energyexplained/us-energy-facts/imports-and-exports.php
https://www.wto.org/english/res_e/booksp_e/anrep_e/anrep17_e.pdf
https://www.aspistrategist.org.au/eus-red-tape-is-helping-russia/