Her guests include Chinese ambassador Cui Tiankai, who has called Bao Bao Washington’s other Chinese ambassador, acknowledging a longstanding practice of “panda diplomacy” where China would gift or loan pandas as a message of cute goodwill between two countries.

From territorial disputes in two of Asia's major seas to the nuclear crisis in North Korea, Chinese and US officials have exchanged sharp words - a trend that analysts say has heightened China's frustration over what it perceives as intensifying efforts to contain its rise.