Trade is topping the agenda for the Chinese President during his first official visit to the United States. Hu Jintao embarked on the four day tour yesterday – his first stop was a meeting with Microsoft founder Bill Gates. Following the meeting Hu pledged to continue striving against software piracy adding that co-operation between Beijing and the computer giant would be stepped up. China recently signed large commercial deals with both Microsoft and Boeing.With 80 737 jets ordered, Hu is also visiting the offices of the aerospace giant today. But the highlight of the trip comes tomorrow with a summit with President George W. Bush. The two leaders are expected to cover trade and moves to avert nuclear advances in North Korea and Iran. But while the Chinese President’s visit is being greeted enthusiastically in some circles for others it is serious cause for concern. Activists have gathered close to where Hu has been staying – they include protesters demanding China get out of Tibet and others claiming Taiwan’s right to independence.