Widely-read tabloid the Global Times, published by the ruling Communist Party's People's Daily, said the increasingly likely trade war would bring chaos to the world.
China has said it will not "fire the first shot", but its customs agency made clear on Thursday that Chinese tariffs on US goods would take effect immediately after USA duties on Chinese goods kick in.
In this March 29, 2018, photo, Chinese Ministry of Commerce spokesman Gao Feng listens to a reporter's question during a press conference at the Ministry of Commerce in Beijing.
Washington's targets for higher border taxes focus on industrial components like PC parts, fuel pumps, construction equipment and autos, according to trade data firm Panjiva.
Washington and Beijing are making global headlines with threats over the prospect of a trade war, but they're also hurling indirect criticisms at each other on a more subtle front: Official travel warnings cautioning their respective citizens about the dangers associated with traveling from China to the USA - or vice-versa.
And Gao noted that of the $34 billion in taxable products on the U.S. list, about $20 billion - or almost two-thirds - are made by firms with foreign investment, including a "significant portion" from America.
"U.S. measures are essentially attacking global supply and value chains".
In response, China asked the EU, which is the world's largest trading bloc, for an alliance against the United States while promising to open up more of China's economy to European competitors.
"We agree with nearly all the complaints the USA has against China, it's just we don't agree with how the United States is handling it", another diplomat said.
"China will not bow in the face of threats and blackmail", he added.
A Chinese government spokesman has said Thursday, July 5, 2018, that Beijing "will not bow in the face of threats and blackmail" on the eve of US tariff hikes and will defend its interests.
The clash with China comes as the Trump administration is also fighting over trade with American allies such as Canada and the European Union.
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Relations have soured between US President Donald Trump's administration and that of Chinese President Xi Jinping since they met in Beijing previous year, sparking fears of an all-out trade war.
Another example of unfounded finger-pointing by the United States is the Made-in-China 2025 initiative.
He emphasised that USA tariffs on Chinese exports will hurt both Chinese and foreign firms.
Chinese stocks slipped on Thursday and the yuan steadied from earlier losses as a targeted cut of reserve requirements for banks took effect amid the heightened trade tensions.
China's central bank moved to calm jittery financial markets on Tuesday after the yuan dropped through the psychologically significant 6.7 to the dollar mark, hitting its lowest in nearly a year.
The warning, which Reuters described Tuesday as similar to a previous advisory posted by the embassy in January, contrasted sharply from the latest China-related travel alert issued by U.S. State Department.
Is a US-China trade war on the horizon?
A USA industry source said: "There is a 99 per cent chance that tariffs go into force on Friday".
The U.S. alert, also circulated in January, urged Americans to "exercise increased caution in China due to the arbitrary enforcement of local laws and special restrictions on dual U.S".
A senior Western diplomat told Reuters that there was no sign of any talks at the moment between the two countries, even via back channels.
Chinese Xinhua news agency said on Wednesday that China and Europe "should resist trade protectionism hand in hand".