On Monday, the South Korean president's office said the United States had approved Samsung Electronics and SK Hynix to supply U.S. chip equipment to their Chinese factories without a separate approval process, media reports said.。The move is a waiver from broader U.S. restrictions banning the export of advanced chip-making equipment to China.。This means that the biggest economic and trade problems facing Korean semiconductor companies have come to an end, and the uncertainty of Korean semiconductor companies' operations and investments in China has been greatly eased.。