She is among the most influential foreign ambassadors in Washington, but she¡¯s technically not an ambassador. She works from a grand estate but cannot live there. Simply flying her flag could cause a diplomatic incident.

This is life in the gray zone for Taiwan¡¯s senior diplomat in the United States, Bi-khim Hsiao, who enjoys powerful insider access but endures a peculiar outsider status.

She speaks almost daily with senior Biden administration officials and is wired into leaders of both parties in Congress. ¡°Taiwan has one of the most effective diplomatic representations in Washington of any country,¡± said John Bolton, a former national security adviser in the Trump White House.