Vietnam suspects that a surge in plywood exports to the U.S. is actually coming from Chinese firms looking to avoid trade war tariffs.  There are signs that Vietnamese businesses are involved in exporting Chinese plywood to the U.S, the Ministry of Industry and Trade said, adding that the U.S. is investigating American importers suspected of buying plywood products from China.  Plywood is one of the Chinese products on which U.S. President Donald Trump has imposed a 25 percent tariff.  Vietnam's plywood exports to the U.S. in the first ...