AN ANALYSIS OF THE U. S. OPEN DOOR POLICY Yan Siguang ( 115) A short history of the U. S. open door policy towards China, as viewed by the author. During the first thirty years of the twentieth century this policy of the United States, though not first initiated by her, in fact neither restrained nor delayed the imperialist aggressions against China. On the contrary, the United States gained increasingly more rights and interests in China during this period.