How many years does the ambassador to the United States hold office?

Two to four years. According to the regulations on the term of office and leave of permanent staff of foreign embassies and consulates in China, the term of office of China's ambassadors abroad is generally 2 to 4 years. In special countries and regions, its term of office can be shortened to two years. The Embassy of the People's Republic of China in the United States of China, referred to as "American Embassy in the United States", is a diplomatic institution established by China in the United States, located in the northwest of Washington, DC.