BEIJING - US Secretary of State Hillary Clinton said Friday that the United States welcomes a strong, prosperous and successful China.

"We want to see China not only deliver economic prosperity for its large population, but also play a key role in world affairs," Clinton said at a press briefing after the fourth-round of China-US Strategic and Economic Dialogues (S&ED) concluded in Beijing.

Clinton said the United States is committed to pursuing a positive, cooperative and comprehensive relationship with China.

"The two nations are building a resilient relationship that allows both countries to thrive without unhealthy competition, rivalry or conflicts," she said.

The United States and China are working to write a "new answer" for an "age-old question" on how an established power and a rising power coexist with each other, according to the top US diplomat.

Clinton hailed the latest round of the S&ED, saying the dialogues are "highly productive" and serve as a "testament of how far the two countries have come in building a strong and resilient relationship and being able to have very candid and open discussions about issues where there are disagreements."

The two countries need this kind of regular mechanism for strengthening their partnership, she said, adding the US and Chinese leaderships in future also need the dialogues to pursue mutual benefit.

"There is no short-cut to spending time listening, exchanging views and looking for ways to build strategic trust and understanding," she added.

Initiated in 2009 by the heads of state of the two countries, the annual S&ED has become a major channel for high-level communication between China and the United States.