Chinese Foreign Ministry spokesperson Guo Jiakun

The Chinese side always firmly opposes countries having diplomatic relations with China negotiating and signing any agreement with China's Taiwan region that carries sovereign implications and is of an official nature, Chinese Foreign Ministry spokesperson Guo Jiakun said on Friday, responding to a question over media reports saying that the US Commerce Department has made a statement claiming reaching so-called "trade deal" with China's Taiwan region.

As part of the agreement, Taiwan chip and technology companies will invest at least $250 billion in production capacity in the US, and Taiwan will guarantee $250 billion in credit for these companies, Reuters reported. 

In exchange, the US will limit "reciprocal" tariffs on Taiwan to 15%, down from 20%, and commit to zero reciprocal tariffs on generic pharmaceuticals, their ingredients, aircraft components and some natural resources, according to the report. 

Guo urged the US to earnestly abide by the one-China principle and the three China-US joint communiques.