March 2007 The New York Times reported that China's state-run Zhuhai Zhenrong Trading, the biggest buyer of Iranian crude worldwide, began paying for its oil in euros late last year. Iranian officials have said for months that more than half the OPEC member's customers switched their payment currency away from the dollar as Tehran seeks to diversify its reserves, but news of the Zhenrong change is the first outside confirmation. Japan has also announced that it would be willing to switch to Yen from US Dollars. Iran's central banker announced in March 2007 that Iran had cut its holding of U.S.-dollar assets to around 20% of its foreign reserves in response to U.S. hostility.