Hu said that China's shadow banking, although lacking the chain of asset securitization of its foreign counterparts, is still susceptible to potential crisis.

To rein in swelling local government debts, Hu suggested, a third-party independent institution be introduced to assess local governments' capacity to service debts. Media should also be encouraged to supervise local debt problems, she said.

Former finance minister Xiang Huaicheng, however, denied that China's government debt has risen to a grave and critical level.

China's debt-to-GDP ratio is not very high, and most of the debts are internal, said Xiang, stressing that the country insisted on being "sustainable" over debt problems.

According to official data, the sum of debts of both the country's central government and local governments amounted to over 30 trillion yuan ($4.8 trillion) in 2011, and added another couple of trillions in 2012, Xiang said. He admitted the actual figure for local government debt may be higher than published statistics.

But Xiang agreed that administrative measures should be taken in preventing local governments from paying debts for lower-level governments and local companies in a blind way.

The former minister added that some credit provided by policy banks is of a similar nature to government debt, and the sum is "not very small".

Who's next in debt crisis?

Speaking of where the next debt crisis would emerge, analysts and economists have divided views.

Parr forecast that the next crisis may come when central banks cannot settle their huge debts. World banks have at no time in history borrowed on such a large scale, he said.

Hu predicted that the debt crisis may stage a comeback in the Eurozone in the next one or two years, but will be less serious than in the case of Cyprus. In the medium and long run, new debt crises are likely to erupt in emerging markets.

Hu Zuliu, chairman of China-based investment firm Primavera Capital Group, identified China as the next victim. Compared with major developed countries, it faces a more complex debt situation, he said.

The United States, according to Byrne, also faces a grim outlook. Moody's forecast the size of the US government's spending in social welfare, including healthcare and pension, will rise out of control and result in higher government debt, which would put its current AAA credit rating under threat.

Zhang also forecast the next crisis would happen in the United States once the dollar's status as the world's predominant reserve currency is shaken. But in the near term, the Eurozone may suffer a further debt crisis, with Spain or Italy a likely target, the economist said.