Before posing her question to the government official, Xiao Yaqing, Ms. Zhang had introduced herself as the operating director of American Multimedia Television U.S.A., a Los Angeles-based broadcaster that has had partnerships with Chinese state-run television in the past, according to its website. Its president, Jason Quin, also lists himself on LinkedIn as the president of a Los Angeles Confucius Institute, organizations supported by Beijing that promote Chinese culture and propaganda overseas.