Samsung, SK Hynix and Micron have all confirmed the visits of China's antitrust regulators to their local offices. The companies said they would cooperate but did not elaborate. According to China's antitrust law, Samsung, SK Hynix and Micron could be fined between US$800 million and US$8 billion if found to have engaged in price fixing, the sources noted. The estimated fines are based on their DRAM sales to China in 2016-2017. The three DRAM vendors, along with Infineon and Elpida Memory, were previously fined by the US for price fixing practices between 1999 and 2002. Infineon has already exited the DRAM business, while Elpida was later acquired by Micron.