The U.S. has reaffirmed its support for Taiwan, according to multiple media reports Thursday.
"The US side has repeatedly reaffirmed its clear and firm support for Taiwan," Cabinet spokesperson Michelle Lee was quoted by the AFP as saying to reporters.
Chinese President Xi Jinping earlier said the question on Taiwan is the most important issue in bilateral relations with the U.S., according to a Xinhua report.
Ahead of the US-China summit, China's Embassy in the U.S. outlined four "red lines" that it said "must not be challenged" during the bilateral talks. These include "the Taiwan question."
China regards self-governing Taiwan as its province. The U.S. recognizes the government in Beijing but its domestic law requires providing weapons to Taiwan so it could defend itself, the AFP said.