While in Washington, Burlingame negotiated a treaty with Secretary of State William H. Seward, his former superior to revise and expand upon the points established in the Treaty of Tianjin of 1858. The first few articles of the new treaty protected commerce conducted in Chinese ports and cities, and established the right of China to appoint consuls to American port cities. The more groundbreaking articles included measures that promised the Chinese the right to free immigration and travel within the United States, and allowed for the protection of Chinese citizens in the United States in accordance with the most-favored-nation principle. Another article gave the citizens of the two nations reciprocal access to education and schooling when living in the other country. All of these articles served to reinforce the principle of equality between the two nations.