What did President Xi Jinping warn about regarding Taiwan during the talks with President Trump?

President Xi Jinping issued a stark warning that mishandling the Taiwan issue could push U.S.-China relations to 'a very dangerous place,' making it a sharp, though not unprecedented, moment during an otherwise friendly and pomp-filled summit; this remark was delivered in a closed-door meeting lasting over two hours, according to China's foreign ministry.

What major commercial agreement was announced between the U.S. and China during the summit, and how did markets react?

Trump announced that China agreed to order 200 Boeing BA.N jets — its first purchase of U.S.-made commercial jets in nearly a decade — but the figure fell far short of market expectations of 500 or more aircraft, causing Boeing shares to drop more than 4% after the announcement.