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Li also urged the two countries to tap their cooperation potential in sci-tech innovation as they have designated the years of 2020 and 2021 as "Year of Scientific and Technological Innovation" in each other's country.

A total of 502 economic cooperation deals were signed at the event, of which 439 were international projects.

Facing regional and international circumstances fraught with uncertainties, the senior Chinese official said it is more significant for China and Pakistan to enhance strategic communication.

Night-time sightseeing is the highlight of the Mid-Autumn Festival, with Xi'an, Chongqing, Xiamen and Chengdu ranking among the most popular places for sightseeing at night, according to the ministry.

But unlike an X-ray from a synchrotron radiation facility, which is also used to explore the microstructure of materials, neutrons are not sensitive to the number of electrons and are a better "probe" when studying materials containing light elements with fewer electrons, such as carbon, hydrogen and oxygen.