The strait, which separates China from the democratically governed island of Taiwan, is a frequent source of tension as Beijing steps up its political and military pressure.
Taiwan's President Tsai Ing-wen's government has repeatedly warned of China's attempts to influence public opinion on the democratically governed island.
Biden made the remarks a day after Secretary of State Antony Blinken met Xi on a trip to China that was aimed at easing tensions between the two countries.
At one of the most significant US-China exchanges since US President Joe Biden took office, Blinken and Chinese President Xi Jinping met on Monday and agreed to stabilize their intense rivalry.
Following an April announcement by China’s Foreign Minister Qin Gang, that China was ready to facilitate peace talks between Israel and the Palestinians.
The regional agreement with Iran would replace and expand an interim pact that already provides a reduction in customs duties on hundreds of categories of goods.
Chinese readout of Sunday's meetings described it as constructive but made clear that Taiwan is the most important issue, and a potentially dangerous one.
Kacaw’s impressive cultural and artistic efforts seem linked to a shift the Chinese Republic is going through. Time will tell how Israelis respond to this unique exhibition.
Kissinger recently waffled quite awkwardly – no, embarrassingly – about how to best address the raging conflagration in Ukraine. He deserves attention, but veneration too? Most assuredly not.
The two leaders discussed bilateral relations and deepening economic ties.