Trade tensions between the US and China have been escalating for months, driven by President Trump's aggressive rhetoric and policy positions.
"In violation of the bilateral consensus reached after multiple rounds of negotiations, the United States has again unilaterally escalated trade frictions", the Chinese State Council Tariff Commission said in its statement on Friday.
"We urge the United States to correct its attitude and not to try to blackmail China because it will never work", said Geng at a news conference.
The risk of a trade war between the US and China has grabbed markets' attention recently, fuelled by headlines; Twitter quotes from Donald Trump and also because of the threat of retaliatory action from China.
Camuñez notes that the Trump administration has given mixed signals about how tough it's willing to be with China, and that has complicated efforts to resolve the conflict.
China and the US have raised tariffs on billions of dollars of each other's goods over complaints Beijing steals or pressures foreign companies to hand over technology.
Asked about communication between the two countries on the dispute, Geng said China had "always upheld using dialogue and consultations to handle trade frictions", but that dialogue must be based on mutual respect and equality.
So far, the United States has imposed duties on $34 billion of imports from China as part of a first tranche of sanctions on $50 billion of goods.
Participants at the meeting in Geneva on July 31 said they are considering an array of options, including an appeal to the World Trade Organization's dispute settlement system and the imposition of retaliatory tariffs against USA goods.
Trump on Wednesday instructed the US Trade Representative to look into increasing tariffs on Chinese imports including fish, petroleum, chemicals, refrigerators, handbags and other goods to 25 per cent, reports The New York Times.
The initial set of tariffs and reprisals led to talks between Washington and Beijing, and Trump and his administration touted a deal that they said would lead to hundreds of billions of dollars worth of additional USA exports to China.
White House economic adviser Larry Kudlow warned China after it announced its retaliatory tariffs, saying Beijing should not underestimate US President Donald Trump's determination to act on trade.
Administration officials told reporters in a phone briefing later that President Donald Trump had directed trade officials to consider raising proposed tariff rates on US$200 billion worth of Chinese imports from 10% to 25%, multiple news outlets reported. China immediately responded with its own tariffs on U.S. goods worth $34 billion. China immediately vowed to retaliate though at the same time urged the United States to act rationally and return to talks to resolve the dispute.
But the USA president isn't backing down. It has typically taken several weeks after the closing of public comments for tariffs to be formally activated.
The U.S. Trade Representative's office initially had set a deadline for final public comments on the proposed 10 percent tariffs to be filed by August 30, with public hearings scheduled for August 20-23.