China has imposed an outright ban on exports to the United States of a number of materials critical for the production of semiconductor components. The Ministry of Commerce of the People's Republic of China announced on Tuesday a ban on the export of gallium, germanium, antimony and superhard materials. In addition, Beijing plans to introduce stricter controls on the use of graphite products.This decision was a response to new export control measures announced by Washington a day earlier against... আরও পড়ুন