The department's decision comes in the wake of the recent ban on USA government departments buying devices and equipment from fellow Chinese vendor Huawei.
Shares of several U.S. suppliers of ZTE slumped immediately after the U.S. Department of Commerce banned sales of components to ZTE for seven years for its alleged violations of the Export Administration Regulations.
"We hope that the United States doesn't take any further steps to damage confidence in the American business environment", Hua said at a regular press briefing.
Huawei, the world's largest maker of telecommunications network equipment and the No 3 smartphone supplier, said it complies with "all applicable laws and regulations where it operates, including the applicable export control and sanction laws and regulations of the UN, US and European Union".
The Justice Department probe comes after subpoenas were issued to the company by the U.S. Commerce and Treasury departments over sanctions-related issues, according to Reuters, The Wall Street Journal, The New York Times, and other media, which cited anonymous officials.
Both companies also have been under scrutiny by U.S. lawmakers over cybersecurity concerns. China doesn't actually have any sanctions on the country, and shipping Chinese technology would not directly violate U.S. sanctions.
With the development of internationalization, the company pledged to protect legitimate rights of shareholders and uphold responsibilities to hundreds of global clients, thousands of partners and suppliers and hundreds of millions of end users, Yin added.
Huawei and ZTE have denied these allegations.
"The ban will not only severely impact the survival and development of ZTE, but also cause damage to all partners of ZTE including a large number of us companies", ZTE said in a statement.
According to the report, the Department of Commerce has agreed to receive new evidence from ZTE through an informal procedure.
But as the Commerce Department revealed last week, ZTE never reprimanded its 35 lower-level employees, and worse, it made false statements to the Department about its compliance.
American companies that supply chips and other components to Chinese telecom equipment maker ZTE Corp. are experiencing sizable revenue loss after the United States imposed a denial of export privileges against the company on April 16.