China on Friday challenged the United States to present evidence proving Beijing's involvement in a case of theft of trade secrets from a US semiconductor manufacturer by Chinese and Taiwanese companies.
"If the United States is really concerned, it should present tangible evidence," Lu Kang, a spokesman for the Chinese Foreign Ministry, told a news conference.
US justice on Thursday accused a company controlled by the Chinese government as well as a Taiwanese company and three Taiwanese citizens of trying to steal trade secrets from Micron Technology.
"As this case and other recent cases demonstrated, Chinese economic espionage against the United States is increasing, and rapidly increasing," said US Attorney General Jeff Sessions.
Micron, based in Idaho (northwest), is the world's fourth semiconductor maker with a market share of 20 to 25% of the DRAM (dynamic memory chips) industry, "a technology that the Chinese did not own until recently", said Sessions, which assesses the damage in 8,750 million dollars.