Today, a deepening global divide sets the slow-growing US and other advanced economies against many emerging economies and commodity producing nations. The former are coping with deflation; the latter are struggling with inflation. The worldwide impact of the QE is only aggravating the chasm, as indicated by Germany's critique of US monetary policies and other rifts among the G20 nations.

After their gains in the US midterm election, leading Republicans have expressed "deep concerns" over the Fed's moves to stimulate the economy. The European Union is struggling to contain the debt crisis and sustain the euro. In Japan, public debt already accounts for more than 200 percent of GDP.

Only a decade ago, the advanced economies of North America, Western Europe and Japan drove the global growth. Today, the G7 nations are navigating into unchartered waters, with the potential of unpredictable outcomes and unprecedented collateral damage.

In the 1990s, emerging and developing economies were still dependent on the growth of the G7 economies. Global growth was predicated on the growing prosperity of the leading Western nations. In the past decade, this relationship went through a reversal. Today, the developing countries are dependent on the growth of China that, along with a handful of other large emerging economies, drives global growth.

Consequently, the emerging and developing economies - and especially those that have lower export similarities with China - have a vested interest in the gradual evolution of China's exchange rate, as noted by the Organization for Economic Cooperation and Development.

It is not in the interest of the developing world that China would be pushed into a disruptive, deflationary currency appreciation - which is what happened to Japan.

Between 1971 and the mid-1980s, the yen more than quadrupled relative to the US dollar. Then, the leading advanced economies agreed to allow the US dollar to depreciate in relation to the Japanese yen by intervening in the currency markets.

A few years later, Japan drifted into a long deflationary slump, a near-zero interest rate and heavily impaired bank balance sheets. It is still struggling to overcome the liquidity trap.

Such a future is not in the interest of China, or in the interest of the poor-income countries, which have greatly benefited from China as an engine of their recent growth. If anything, the decline of China's growth would significantly undermine poverty reduction in the emerging world.

The best way China can help support the world economy is through efforts to strengthen its own sustained growth. What is at stake in China's growth is not just national prosperity, but the future of poverty reduction in the developing world and the continued well-being in the advanced world.

The rest of the world of the world will take the same road that China takes.

The author is research director of International Business at the India, China and America Institute (US) and visiting fellow at Shanghai Institutes for International Studies (China).