China's position on tariffs is very clear, and there are no winners in tariff wars, a foreign ministry spokesperson said Tuesday.

Spokesperson Mao Ning also said China will firmly safeguard its legitimate rights and interests.

Mao made the remarks at a regular news briefing after U.S. President Donald Trump said Monday that any country doing business with Iran will pay a tariff rate of 25 percent on any business conducted with the United States.