The file photo taken on June 17, 2016 shows Anna Chan Chennault, mother of Cynthia Chennault, attending her 91st birthday celebration at the UN headquarters in New York. Over the past decades, Cynthia Chennault traveled frequently between the United States and China, dedicated to cultural and people-to-people exchanges, an effort she deemed vital for the friendship long forged by the two nations. (Xinhua/Li Muzi)