The chairman of Huawei challenged the United States and other governments to provide evidence for claims the Chinese tech giant is a security risk as the company launched a public relations effort Tuesday to defuse fears that threaten its role in next-generation communications, Washington Post reported.

Talking to reporters who were invited to Huawei Technologies Ltd.’s headquarters, Ken Hu complained accusations against the biggest global maker of network gear stem from “ideology and geopolitics.” He warned excluding Huawei from fifth-generation networks in Australia and other markets would hurt consumers by raising prices and slowing innovation.

Australia and New Zealand have barred Huawei in 5G networks on security grounds. They joined the United States and Taiwan, which have broader curbs on Huawei. Japan’s cybersecurity agency says suppliers including Huawei that are deemed high-risk will be excluded from government purchases.

The curbs have had little impact so far on Huawei, which says global sales are on track to top $100 billion this year. But the normally press-shy company’s decision to hold Tuesday’s event appeared to reflect growing concern the accusations could hurt it in an emerging 5G market that industry analysts say could be worth $20 billion a year by 2022.

“If you have proof or evidence, it should be made known,” said Hu. “Maybe not to Huawei and maybe not to the public, but to telecom operators, because they are the ones that buy Huawei.”