In a tit-for-tat response, China today said it has imposed "retaliatory measures on US goods" as US tariffs kicked in on Friday.
The US has levied 25% tariffs on Chinese goods which came into effect at midnight Washington time on Friday (12:01am Washington D.C. time, 0401 GMT).
"After the US activated its tariff measures against China, China's measures against the US took effect immediately," said Lu Kang, spokesman for the foreign ministry.
As the US tariffs came into effect, China said it was "typical trade bullying" that could trigger "global market turmoil".
Lu, however, declined to give precise details although the commerce ministry had previously released a list that matched Washington's $34 billion tariffs.
China had earlier said it wouldn't "fire the first shot" as the trade war between the two biggest powers escalated to a new level.
"Bullying and threatening will lead to nowhere. Our position remains consistent and very clear," Kang added.
Chinese state media slammed US President Donald Trump's government as a "gang of hoodlums" as the trade row threatens to disrupt global trade. The US has imposed tariffs on 545 Chinese products.