U.S. Representatives Robert Pittenger, center, Dan Kildee, right, and Jared Huffman, left, talk to media people at the Landstuhl Regional Medical Center in Landstuhl, Germany, Jan. 18, 2016. Michael Probst AP
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China’s Foreign Ministry could not be reached for comment Tuesday.

However, a foreign ministry spokesman Monday defended a Chinese investment fund’s effort to purchase the German semiconductor firm Aixtron SE, which has U.S. assets, saying the "Chinese government encourages Chinese companies to engage in overseas investment and cooperation following market rules, international regulations and local laws."

Obama Friday blocked the sale of Aixtron SE to the Fujian Grand Chip Investment Fund LP, which is part-owned by the Chinese government.

"We oppose politicizing or interfering in through political means normal commercial acquisitions, and hope that the U.S. can stop making unfounded accusations of Chinese companies and provide a level playing field and conveniences for Chinese companies’ investment as this serves the common interests of both sides in a long term perspective," foreign ministry spokesman Lu Kang told reporters Monday.