The Best Investment Plans of Reserve
责任准备金的最优投资计划

In this paper, two investment models of reserve are given: one model is of only deposit and another is of either deposit or buying national debt. These models can make the reserve which has no economic profit bring some profit. From the models, a method which is the best for investment is found; it can be either deposit or buying national debt. A simple example is used with a satisfactory result is the paper. Hoping the models can offer a reference way to our national insurance fund.