Hua stressed that firms, no matter the country they were based in, had the right to make their own decisions on which foreign companies to cooperate and maintain contacts with.
"Any country and any person should fully respect this", she said.
READ MORE: US Does Not Consider Nord Stream 2 a Commercial Project — Researcher
German media reported last week that Richard Grenell had written letters to companies involved in the project, saying they faced a significant risk of being targeted with sanctions.
The United States has been strongly opposing the pipeline construction project. In this regard, Russian President Vladimir Putin has voiced the belief that US leader Donald Trump is seeking to force Russia out of the European energy market so that the United States could sell more liquefied natural gas to Europe.