US China Huawei

A worker holds a sign promoting a sale for Huawei 5G internet services at a mobile phones retail shop in Shenzhen in south China’s Guangdong province, Tuesday, Dec. 18, 2018. 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. (AP Photo/Andy Wong)