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DEF CON has become the symbol of the geek spirit, especially with China's 5,000-years of history where sages pursued the ultimate perfection of human wisdom influencing the modern geek spirit. While advocating the spirit of geeks, Baidu Security has also enabled global geeks to become more aware of China and expand the cognitive boundaries of the geek spirit.

Cui said that because the two nations are the world's largest economies and permanent members of the United Nations Security Council, "the cooperation between China and the US is for our own interests but also our responsibility to the global community".

Cross-border supply has become the platform's key business for future development, as it offers digital spot purchasing services to global e-commerce sellers, linking them with domestic source factories, Wang said.

Crude oil storage tanks are seen in an aerial photograph at the Cushing oil hub in Cushing, Oklahoma, US, April 21, 2020. [Photo/Agencies]

Cui Fan, a professor of international trade at the University of International Business and Economics in Beijing, said that it has been a common international practice to implement negative lists for technology exports, and adjustments have become necessary thanks to the development of new technologies since the catalog was last revised in 2008.