Explanation:
The purpose of Hay's notes was to grant all the major powers equal access to Chinese trade and reduce the influence of countries that already had an especially large hold in China (such as Japan and Russia) so they couldn't force other countries (particularly the United States) out of the Chinese market.
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The British Parliament passes the Tea Act, a bill designed to save the faltering East India Company from bankruptcy by greatly lowering the tea tax it paid to the British government and, thus, granting it a de facto monopoly on the American tea trade.
Germany's resumption of unrestricted submarine warfare