Earlier this year, the procurement center also excluded the government's purchase of Microsoft's Windows 8, without elaborating why.
China has been more vocal in calling for better Internet security, in the light of leaks about the U.S.'s secret surveillance programs. Former National Security Agency contractor Edward Snowden has claimed that the U.S. has hacked into Chinese companies and schools.
In May, China announced it would vet major IT products sold in the country for security threats. Companies that failed to pass the scrutiny would be banned from the country.