The Chinese government has launched an economic war against South Korea due to the US setting up the Terminal High Altitude Area Defense (THAAD) system in South Korea. China is targeting South Korean businesses, including Lotte Mart stores and a theme-park project, causing significant financial losses. The move demonstrates China's authoritative governance and ability to control its people's views. The situation will have implications for managers of Korean firms and President Trump's upcoming negotiations with the Chinese premier.