門戸開放政策
Commodore Lawrence Kearny (30 November 1789 – 29 November 1868) was an officer in the United States Navy during the early nineteenth century. In the early 1840s he began negotiations with China which opened that country to U.S. trade and pointed the way toward the American Open Door Policy a half century later. He was Mayor of Perth Amboy, New Jersey in 1848.