Write a one page introduction about China coercion of South Korea, you can use these articles for information about the case but no need for citation.
https://www.brookings.edu/articles/chinese-non-military-coercion-tactics-and-rationale/
p.p1 {margin: 0.0px 0.0px 27.0px 0.0px; line-height: 23.0px; font: 12.0px 'Times New Roman'; color: #4c4c4c; -webkit-text-stroke: #4c4c4c; background-color: #fafafa} span.s1 {font-kerning: none} Only the (CHINESE COERCION AGAINST SOUTH KOREA REGARDING THAAD) part
http://www.theasanforum.org/chinese-economic-coercion-during-the-thaad-dispute/