Los Angeles Times reports: "The bustling Myeongdong neighborhood has long been this city's most-visited tourist spot... But over the last year even the street vendors have noticed a steep decline in sales... The reason: South Korea's new missile defense system, known as THAAD. China objects to it and has been flexing its economic muscle in protest, carrying out an aggressive campaign of economic retaliation that includes sending fewer tourists. In 2017, just over 4 million Chinese visited South Korea, down from roughly 8 million a year earlier after several years of steady growth... The Terminal High Altitude Area Defense was installed last spring on a former golf course in the country's south by South Korea's most important ally, the United States... China says the system's radar encroaches on its sovereignty and threatens its national security. South Korean President Moon Jae-in has tried to patch things up, visiting Beijing in December and agreeing to not install any new missile systems or link the current one with the United States' overall defense network in Asia. The meeting seemed to help, but merchants say the effects of the retaliation linger."