On Wednesday, Beijing urged Washington to stop oppressing and restricting Chinese students studying in the country under the pretext of national security, vowing to take measures to safeguard its national security and the legitimate and lawful rights and interests of Chinese citizens.

Foreign Ministry spokesman Wang Wenbin made the remarks in response to reports that Chinese students were once again interrogated when entering the United States at the Washington Dulles International Airport.

It is reported that the U.S. law-enforcement personnel repeatedly asked questions on the students' political background and academic research, and ask them to provide internal information of the Chinese government in order to get released.

After refusing, the U.S. law-enforcement personnel decided to cancel their visas, banning them from entering the country and forcibly deporting the students.

At least eight Chinese students with valid travel documents have been harassed, interrogated and deported by the U.S. at the Dulles International Airport for no reason since the end of November, according to the spokesman.

China has made serious demarches to the U.S. over the move, which undermines Chinese citizens' lawful and legitimate rights and interests, disrupts bilateral people-to-people exchanges and cross-border travels, Wang said.

While portraying itself as an open, inclusive place for academic freedom and boasting about "science without borders", the U.S. overstretched the concept of national security, politicized and weaponized academic research, and repeatedly oppressed Chinese students, which infringed upon their basic human rights, Wang said.

The U.S. practice caused the "chilling effect" and poisoned the atmosphere for bilateral people-to-people exchanges, he said.

In recent cases, the U.S. law-enforcement personnel induced and infiltrated in the victims, which posed a direct threat to China's national security, Wang said.

"The U.S. move is driven by ideological bias, which is discriminatory and politically motivated law-enforcement without bottom lines, and will eventually undermine its own image," he said.

"China urges the U.S. to earnestly protect the security and the lawful rights and interests of Chinese students and scholars in the U.S. and remove barriers in China-U.S. people-to-people exchanges and cross-border travels," Wang said.