The achievements in China-U.S. relations are primarily attributable to the collective efforts of the people of the two countries, Chinese President Xi Jinping has said.

Xi made the remarks in his reply on January 4 to a letter from Sarah Lande, a friend of his in the U.S. state of Iowa.

Noting that China is the largest developing country and the United States the largest developed country in the world, Xi said the future of this planet needs stability and improvement of China-U.S. relations.

Xi also said China is ready to work with the United States to push for steady, sound and sustainable development of bilateral relations.