An active-duty U.S. army sergeant has been charged with repeatedly selling sensitive military and national defense secrets to co-conspirators working on behalf of China, according to newly unsealed court records.

Jian Zhao, a battery supply sergeant stationed at Joint Base Lewis McChord in Washington state, is alleged by federal prosecutors to have communicated with an unnamed co-conspirator from July to December of last year in order to sell an encrypted military computer and 20 classified hard drives.

Zhao is charged with conspiring to obtain and transmit national defense information as well as bribery and theft of government property.