U.S. President Barack Obama said on Sunday that bilateral talks with China's Xi Jinping had been "extremely productive," as world leaders gathered for a G-20 summit expected to address sluggish global economic growth and the looming spectre of protectionism.
Some G-20 leaders have already begun drawing battle lines in disputes over issues like trade and investment, tax policy, and industrial overcapacity.
Security is extremely tight in Hangzhou, with parts of the city of 9 million people turned into a virtual ghost town as China seeks to ensure that the G-20 summit is incident-free.
Obama, who arrived on Saturday, held talks with Xi that ran late into the night. He urged Beijing to uphold its legal obligations in the disputed waters of the South China Sea, and stressed U.S. commitments to its regional allies.
Xi said China would continue to safeguard its sovereignty and maritime rights in the South China Sea.
Obama brushed off his chaotic welcome at the Hangzhou airport where his staff argued with Chinese security over media access. He was also not offered a staircase to disembark at the front of Air Force One, and staffers had to scramble to find an alternative exit.