U.S. President Barack Obama welcomed the Chinese President Hu Jintao at the White House on Wednesday. In welcoming the Mr. Jintao, Mr. Obama referred to the three decades since the normalisation of relations between the two countries. He said with this visit, the two man could lay the foundation for the next three years. He said, both countries would be more prosperous when they work together. Mr. Hu expressed his pleasure at visiting the US. He said, his visit aims to enhance the friendship between the two countries and extend their cooperations.