For many centuries China had been a hermit nation, successfully resisting foreign influence and invasion; but gradually, on one pretext or another, she was compelled to open her ports, and Great Britain, Russia, and Germany had gained special advantages and exceptional privileges in portions of China, where, under the guise of "spheres of interest," they were exercising considerable control over an important part of that Empire. It seemed probable that not only would these nations absorb the trade of China, but that the Empire itself would be dismembered and divided among the powers. To prevent this, Secretary Hay advanced the so-called "open door" policy and successfully carried it out.
In September, 1899, he addressed communications to the Governments of Great Britain, Russia, Germany, Italy, and Japan, suggesting that, as he understood it to be the settled policy and purpose of those countries not to use any privileges which might be granted them in China as a means of excluding any commercial rival, and that freedom of trade for them in that ancient empire meant freedom of trade for all the world alike, he considered that the maintenance of this policy was alike urgently demanded by the commercial communities of these several nations, and that it was the only one which would improve existing conditions and extend their future operation. He further suggested that it was the desire of the United States Government that the interests of its citizens should not be prejudiced through exclusive treatment by any of the controlling powers within their respective spheres of interest in China, and that it hoped to retain there an open market for all the world's commerce, remove dangerous sources of international irritation, and promote administrative reform. Secretary Hay accordingly invited a declaration by each of them in regard to the treatment of foreign commerce in their spheres of interest. Without inconsiderable delay the Governments of Great Britain, Russia, Germany, Italy, and Japan replied to his circular note, giving cordial and full assurance of endorsement of the principles suggested by our Government. Thus was successfully begun the since famous "open door" policy in China.