Senior officials who are in charge of Asian affairs in the White House said on Wednesday that the era of contact with China has ended and the United States is entering a period of fierce competition with China.

According to Bloomberg report, Kurt Campbell, a coordinator of the National Security Council, said at a event hosted by Stanford University: "The period when it is widely known as contact is over." The US policy to China will now be in"A series of new strategic parameters" operates, "the main mode will be competition."

Campbell said that the policies implemented under the governance of the Chinese government are largely due to the transformation of the US policy.He then mentioned the military conflict between China and the Indian border, the rise of the "economic movement" of Australia and the rise of China's "wolf warfare" diplomacy.

He pointed out that China's behavior symbolizes the transformation towards "power or hard power", which "indicates that China is determined to play a stronger role."

Campbell's straightforward speech, US President Biden also asked the American intelligence community to "double" to determine the source of the coronary virus.Prior to this, Biden received two contradictory conclusions from the virus from nature and laboratory leakage.