He said CAS houses the best scientists in China and has made numerous scientific achievements.
Xi urged the CAS to continue to carry its spirit forward and build itself into a first-class scientific academy.
While visiting the Beijing Synchrotron Radiation Facility, Xi asked scientists to build a strong scientific research platform.
Xi also held a discussion with CAS officials and scientists, as well as delivered a speech, during his visit.
He asked the scientists and officials to support scientific sectors, as these areas will help transform China's economic growth.
He also encouraged them to boldly innovate, calling for science authorities to create an academic environment that is tolerant of failure.
Xi asked them to not only learn from the world's most advanced science, but also to put new ideas forward.
He also asked the scientists to be patriotic and devote themselves to China's national rejuvenation and modernization.