China-based chip maker Yangtze Memory Technologies Co (YMTC) has asked its U.S. employees in core tech positions to leave, as the company rushes to comply with the new U.S export restrictions, Financial Times news report said.

It was unclear how many U.S. citizens and green card holders would be forced to leave YMTC. Several employees in China had already left the company.

China’s top semiconductor equipment maker Naura Technology Group has told its American employees in China to stop taking part in component and machinery development to comply with Washington’s restrictions on the involvement of US citizens in key chip facilities on the mainland, according to a news report in SCMP.