BEIJING — China showed no sign Tuesday of throwing its support behind new sanctions against Iran following talks with Britain's foreign minister, who had hoped to persuade Beijing to join a growing international consensus for more stringent measures.Chinese Foreign Minister Yang Jiechi maintained that sanctions weren't the solution to disagreements over Iran's nuclear program and that more talks were the way forward."Sanctions do not provide a fundamental solution to the Iranian nuclear issue. Ultimately, this issue has to be appropriately resolved through peaceful negotiations," Yang said at a joint news conference with Britain's David Miliband following their discussions in Beijing.