In addition to changes in the provisions of the Sino-US and Sino-Japanese treaties regarding tax increases and exemptions, the following major new contents have also been added: both treaties stipulate mutual protection of copyrights; the Sino-US treaty stipulates mutual protection of patents; Fengtian (Today's Shenyang, Liaoning) and Andong (today's Dandong, Liaoning) were "opened by China for trade". The Sino-Japanese treaty stipulates: China should unify measures and balances; open Changsha as a treaty port; "If all the troops stationed in Zhili (now Hebei) Province and the troops of various countries' [protection] [embassy] embassy are withdrawn, China will immediately withdraw from Beijing." "Open the trade market"; Fengtian and Dadongou "will be opened by China for trade", and China allows "all Japanese ships that can use the inner port", no matter how big or small, to engage in inner port trade in China according to regulations. Japan attaches great importance to this issue, thus breaking the restriction that only "non-sea-going" foreign ships are allowed to travel through China's domestic ports.