Beijing, May 4 - US Secretary of State Hillary Clinton said Friday the US 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 concluded in Beijing.

Clinton said the US 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 US 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, the top US diplomat said.

Initiated in 2009 by the heads of state of the two countries, the annual dialogue has become a major channel for high-level communication between China and the US.