The sorts of the guaranteed recommendation mainly included the emperor decree guaranteed recommendation, the merit rating guaranteed recommendation and the service guaranteed recommendation etc.

At present, there are some difficulties of reporting, investigating and collecting proof, offering testimony, treating and affecting in the working of environmental protection report.

In order to adhere to its own ruling of feudalism,ancient China s rulers attached great importance to the election, control and management,and set up complete and regular systems of official administration,one of which was the system of recommendation and implication,a combination of China s ancient spirit to recommend talents and be involved in implication.