US Secretary of State John Hay established the policy, which opened China's ports to European trade.

The policy is known as the "Open Door Policy."

John Hay created this idea in hopes that America and countries all over Europe could trade peacefully with China. This concept was developed in order to protect America's trade interests while also ensuring that no other country would establish a monopoly on trade with China. Within this policy, all countries would agree not to interfere with another country's trade with China.