"Our fear is that if China continues to invest so heavily as a share of its GDP, it's just creating the potential for vulnerabilities."

Murtaza Syed, the International Monetary Fund's resident representative in Beijing, saying that no other economy has invested so much as a share of GDP as China has done and the situation could lead to non-performing loans, overcapacity and fiscal problems.

"Generally speaking, foreign companies are optimistic about China. They think there won't be big economic problems in the future. They believe that domestic consumption will continue to grow at a steady rate, and the currency will remain stable despite appreciating more slowly."

Kenneth DeWoskin, director of Deloitte's China Research and Insight Center, saying that most of the executives believed the business environment in China would stay basically the same and "very few" thought it would get worse.