Chancellor George Osborne joked that he and Boris Johnson are like "the yin and the yang" as they both continued their visit to China.
Asked about the timing of their trips which saw the Chancellor and London Mayor in China at the same time, Mr Johnson joked with Beijing students that they were like a "pair of harmonious doves".
The London Mayor was asked who was in charge and he replied: "We are representing our country. It's a nest of singing birds is how I would describe it. It's total harmony, there's probably some Chinese expression that completely perfectly culminates it."
The Chancellor intervened: "The yin and the yang."
Mr Johnson then turned to a Chinese student, asking: "The yin and the yang. What do you say for a harmonious, sounds like one of those Chinese fireworks, a harmonious dove or something like that? A pair of harmonious doves. What is that in Chinese?"
After she looked back blankly, Mr Osborne said: "I think she likes the yin and yang comparatively."