Foreign Minister Yang Jiechi gave a positive assessment of Sino-US relations on Monday, saying that the "atmosphere at the moment is good".

Yang made the remarks during a news conference held on the sidelines of the annual session of the National People's Congress, the top legislature.

He even went into details of the "full agenda" for the world's two largest economies to develop relations in the coming months.

The agenda includes US Vice-President Joe Biden's visit to China in the summer, and Vice-President Xi Jinping's visit to Washington at "an appropriate time".

However, Yang also warned that the US risks improved relations with China if it sells more arms to Taiwan.

"We urge the United States to ... stop selling arms to Taiwan and take concrete action to support the peaceful development of cross-Straits relations," he said. "This is critically important in protecting the overall state of China-US relations."

He urged the US to strictly abide by the three Sino-US joint communiqus and stop the arms sales.

Sino-US relations soured early last year after Washington announced a $6.4 billion arms sale to Taiwan, followed by a meeting between US President Barack Obama and the Dalai Lama at the White House.

However, during President Hu Jintao's state visit to the US in January, the two leaders agreed to "work together to build a cooperative partnership" and signed trade deals worth billions of dollars.

"The presidents of the two countries have charted the course for the development of China-US relations," Yang said. "What we need to do now is to seize the momentum and build on the progress."