HONG KONG (MarketWatch) -- China and Russia will stop using the U.S. dollar to settle bilateral trade and instead use the ruble or the yuan, though the move is not meant to signal a challenge to the dollar, according to reports Wednesday. China's Premier Wen Jiabao and Russian President Vladamir Putin made reference to the new currency trade pact late Tuesday, following meetings in St. Petersburg that also saw the signing of bilateral trade and energy-cooperation agreements, according to a report in the state-run China Daily. "About trade settlement, we have decided to use our own currencies," Putin told reporters, according to the report. Earlier this week, China added the ruble to the list of currencies that can be traded against the yuan on its domestic exchange.