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Customs officials in Urumqi said certificates of origin are official document that prove the goods originated in a particular country, and the products are exported to a country or region that has signed a free-trade agreement with China.

Cullen, a visiting professor at the University of Hong Kong's Faculty of Law, said some Western countries are intent on frightening people about Chinese influence, spreading Sinophobia among global communities.

Cuba has so far sent 2,300 health professionals from its Henry Reeve medical contingent to help combat the COVID-19 pandemic in 24 countries.

DETROIT - Democratic 2020 US presidential candidate Joe Biden says he is done being polite when it comes to defending his decades-long record on race.

Cryptography, as a crucial national resource, relates to the nation's political, economic, defense and information security. It has also been adopted in various aspects of social development, including finance and telecommunication.