In the past, the ties between the United States and China were governed by the constraints of the Cold War. But the Cold War ended two decades ago. Now, it is time to adjust Sino-US relations to the multipolar era.

During his four-day state visit to the US, President Hu Jintao has called for enhanced cooperation with the US in energy, infrastructure development, aviation and space.

At the start of President Hu's visit, the US and China agreed on US export deals worth $45 billion. Even before the visit, Chinese and US businesses had signed agreements worth $600 million in Texas.