Full coverage: Xi Visits Czech Republic, Attends Nuclear Security Summit

Prior to the summit, a Center of Excellence on nuclear security between China and the US has been launched in the southwestern suburb of Beijing. It is an example of the cooperation between the two nations in the field. 

The China-US nuclear security center, Center of Excellence, began operation on March 18th. It's a compound with labs, exhibition areas, classrooms and test sites.

The facility is used to conduct research and train staff from China and other Asian nations on issues such as: the security of hazardous nuclear materials and protection of reactors from attacks.

It is the largest nuclear program financed by both the Chinese and US governments, and is also the largest nuclear security center in the Asia-Pacific region. US Energy Secretary Ernest Moniz attended the opening ceremony in Beijing.

"Most recently, we opened a nuclear security center of excellence. Our secretary brought engineers and scientists from four of our national laboratories to China last week. We'll be collaborating with China going forward," said Elizabeth Sherwood-Randall, Deputy Secretaryof Energy Dept..

The center can train some two thousand people per year. China is responsible for providing the site, construction, operations and administration, while the US will provide equipment concerning nuclear security.

The center came after 28 rounds of negotiations, since leaders from China and the US proposed its establishment during the nuclear summit in 2010.

"This has been really a strong effort in terms of strengthening nuclear security and make sure it transits to other summits into the future, and maintain all of great work that's been accomplished today. By having this center, everyone else in nuclear security," said Bonnie Jenkins, coordinator of Threat Reduction Programs, US State Dept..

The center serves as an example of nuclear security cooperation, not just for China and the US, but also for the entire Asia-Pacific.