Chinese President Hu Jintao joked with his hosts at the Boeing factory in Seattle on the second day of a state visit. Boeing aircraft already make up more than 60 percent of the chinese national fleet and, earlier this month, China bought a further 80 planes from Boeing worth 4.6 billion dollars. Hu Jintao has carefully planned his first official US visit by stopping in Washington State, which has a booming trade relationship with China thanks to Boeing and Microsoft. The US is concerned about its 200 billion dollar trade deficit with China. During lunch with more than 600 business leaders including Henry Kissinger, the Chinese President said disagreements over trade should not be politicised. Today, Hu Jintao flies to Washington for a summit with US President George Bush.