"The mission has made multiple innovations come true and filled a series of international and domestic gaps, which has fully displayed the innovative spirit just as making the first move in chess or taking the initiative in battle," he added.

China should have a grasp of the general trend of the science and technology development in the world, foster respect for science and focus on strategic, basic and pioneering sectors, said Xi.

China should shore up its weakness in certain areas, keep pace with the leaders in some areas, and strive to lead in other areas, aim for significant breakthroughs in core and key technologies, improve the overall efficiency of the national innovation system, boost science and technology strength and innovation ability, in a bid to earn itself a spot in the global hi-tech sector, he said.

"Experience tells us that great undertakings succeed in solid work," Xi noted. He said China need to encourage more prominent scientists, leading talent, young scientists and innovation teams to lead the trend and work hard to realize the value of life by contributing to the nation's great undertakings.

Xi pointed out that exploring the vast universe is a common dream of all humankind. China has been actively advancing international space cooperation and carried out productive cooperation with multiple countries and international organizations. The complete success of the Chang'e-4 mission, for instance, includes contributions of many countries.

China is willing to work with countries around the world and follow the principle of achieving shared growth through discussion and collaboration, so as to deepen the international exchanges on basic scientific research, boost big science projects and step up opening-up and cooperation to enhance innovation ability and push forward the development of science.

The Chang'e-4 mission had two launches. The relay satellite, named Queqiao, meaning Magpie Bridge, was launched on May 21, 2018. The Chang'e-4 probe, launched from the Xichang Satellite Launch Center in southwest China on Dec. 8, 2018, touched down on the far side of the moon on Jan. 3.

Scientific research involving multiple countries and international organizations has been carried out.

The complete success of Chang'e-4 mission marks the first-ever soft landing, patrol and exploration on the far side of the moon by a spacecraft, the first communication link between Earth and the far side of the moon and the first footprints there in the history of lunar exploration, which unveils its mysteries and opens a new chapter in mankind's exploration of the universe. 

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