At a time of economic slowdown combined with market uncertainties, Chinese millionaires' confidence in the country's economy in the next two years has dropped for a second consecutive year, according to the GroupM Knowledge-Hurun Wealth Report 2013.

The report was co-released by the media investment management firm GroupM China and the Shanghai-based Hurun Report on Wednesday.

One quarter of the millionaires surveyed said they were "very confident" in the economy in the next two years, down about 3 percentage points year-on-year. In the previous year, 54 percent of the respondents said that they were "very confident" in the economy.