"[We] are upset and deeply disappointed by the current progress with regard to the reform of the shareholding system in the IMF," Zhou was quoted by China News Service as saying late last week.
The reform envisions a 6 percent shift in voting rights from developed countries to emerging economies. It has repeatedly been stalled by the US Congress because of Washington's de facto veto right at the IMF.
Zhou said that all possible options should be on the table, so as to clinch an "interim solution" to the problem.
He also urged more progress on other important IMF reforms, including those of the governance structure and the inclusion of the yuan in the basket of the Special Drawing Rights.
They are especially angry at the fact that despite BRICS countries accounting for more than one-fifth of the global economy, they have just 11 percent of the IMF's voting power.
Officially established in September 2006, BRICS currently includes Russia, Brazil, India, China and South Africa.
