Iwan Azis, head of the Manila-based bank's Office of Regional Economic Integration, said the Chinese yuan was becoming very important as China's economy grows.
"It is just a matter of time, it's not a matter of yes or no, but a matter of time," he said when asked about the yuan becoming an international currency.
US economist Jeffrey Sachs said the global financial system would benefit from having more than one reserve currency in the system other than the US dollar.//DPA