China's leaders have been accused of delivering a calculated diplomatic snub to Barack Obama after the US president was denied a red-carpet welcome during his chaotic arrival in Hangzhou ahead of the start of the G20. Chinese authorities have rolled out the red carpet for leaders including India's prime minister Narendra Modi, Russian president Vladimir Putin, South Korean president Park Geun-hye, Brazil's president Michel Temer and British prime minister Theresa May, who touched down on Sunday morning. But [Obama] was forced to disembark from Air Force One through a little-used exit in the plane's belly after no rolling staircase was provided when he landed in the eastern Chinese city. When Obama did find his way onto the tarmac, there were heated altercations between US and Chinese officials, with one Chinese official caught on video shouting: "This is our country! This is our airport!" Obama suggested his Chinese hosts might have found the size of the US delegation "a little overwhelming". "We've got a lot of planes, a lot of helicopters, a lot of cars and a lot of guys. If you are a host country, sometimes it may feel a little bit much." Susan Rice, the US national security adviser, admitted she had been surprised by the handling of the president's arrival. "They did things that weren't anticipated," she told reporters.