The United States has revoked more than 1000 visas of Chinese nationals as part of a push to block entry of students and researchers it believes have military links.
President Donald Trump in May restricted the entry of certain students and researchers to the US, saying they were being used in Beijing's campaign to acquire sensitive technologies and intellectual property.
The State Department began implementing the rules effective June 1.
"As of September 8, 2020, the Department has revoked more than 1000 visas of PRC nationals who were found to be subject to Presidential Proclamation 10043 and therefore ineligible for a visa," a department spokeswoman said on Wednesday.
The department has broad authority to revoke visas, she said, and exercises that authority when information comes to light indicating a visa holder may be inadmissible or otherwise ineligible for a visa.
She did not share specific details of whose visas had been revoked.
Earlier on Wednesday, dozens of Chinese students enrolled in US universities said they received notices from the US Embassy in Beijing or US consulates in China informing them their visas had been cancelled.
Some 360,000 Chinese nationals who attend US schools generate annual economic activity of about $US14 billion ($A19 billion), largely from tuition and other fees.
US officials have said the visa actions affect a small portion of those students.