China has issued a pointed warning over Taiwan just hours after Joe Biden and Xi Jingping held a landmark meeting.
A statement released by Beijing on Monday described attempts to block their aims of "national reunification" with the self-ruled island as a "red line that must not be crossed" in future relations with the United States.
The Asian superpower continues to claim US-allied Taiwan as part of its territory under its 'One China' policy, despite the wishes of the majority of its people to remain independent of the mainland.