BEIJING, Sept. 5 (CGTN) -- Chinese Vice Premier Liu He had a phone conversation with U.S. Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin on Thursday morning, at the invitation of the U.S. side.

The two sides have agreed to hold the 13th round of China-U.S. high-level economic and trade consultations in Washington early next month.

Chinese and U.S. chief trade negotiators agreed to jointly take concrete actions to create favorable conditions for bilateral consultations. Negotiating teams from the two sides will carry out detailed consultation in mid-September, making full preparations for the trade talks in October, said China's Ministry of Commerce (MOFCOM).

People who also joined the phone conversation were Chinese Commerce Minister Zhong Shan, People's Bank of China Governor Yi Gang, and deputy head of the National Development and Reform Commission Ning Jizhe.

China on Monday lodged a complaint with the World Trade Organization (WTO), a day after the U.S. imposed tariffs on 300 billion U.S. dollars' worth of Chinese goods, according to the MOFCOM.

China will firmly safeguard its own legitimate rights and interests and resolutely uphold the multilateral trading system as well as the international trade order in line with WTO rules, the ministry said.

On Sunday, part of the new additional tariffs imposed by the U.S. government on 300 billion U.S. dollars' worth of Chinese imports took effect, and the rest will come into force on December 15. Meanwhile, China's first batch of retaliatory tariffs of either 10 or 5 percent on 75 billion U.S. dollars' worth of U.S. goods also went into effect.