Trust funds, also known as investment funds, are a collective investment mode of "benefit sharing and risk bearing".

It refers to the way of issuing fund vouchers (such as income vouchers, fund units and fund shares) through contracts or companies, which pool the unequal funds of most investors who are uncertain in society to form a certain scale of trust assets and hand them over to special ones.

Trust funds are characterized by: 1. Collective investment; 2. Expert management and operation; 3. Portfolio investment and risk diversification; 4. Separation of asset management and asset custody; 5. Benefit sharing and risk bearing; 6. Purely investment; 7. Strong liquidity.