U.S. Vice President Joe Biden’s visit to Beijing is designed to lay the groundwork for later meetings between U.S. officials and rising leader Xi Jinping, who is currently Biden’s Chinese counterpart. Opting for a local favorite rather than a sterile array of table cloths and serving dishes, Biden made some waves on Weibo and in the U.S. media for mingling with local Beijing residents.
And from a past meeting between President Obama, President Carter, President Hu, and Vice President Biden:

President Barack Obama, along with President Hu Jintao of China, former First Lady Rosalynn Carter, and Vice President Joseph Biden, listen to former President Jimmy Carter during a reception in the Yellow Oval Room in the Residence of the White House, Jan. 19, 2011. (Official White House Photo by Pete Souza)