Call it the Great Wealth Rollover of China.

The nation's banks have been introducing new wealth management investment products at a blurring pace over the past year, dazzling upper-class clients with fat catalogues of high-yield investment opportunities.

Yet Caixin has learned from bank and regulatory sources that much of the wealthy investor cash pouring into short-term, high-risk products is being rolled over by banks to provide fresh financing for long-term investments, including unfinished property developments, local government financing platforms, railway projects and private equity.