No, the five tools are mainly for the use of these tools. The internal auditor is a member of the internal audit system of an enterprise, and it is not necessary to be able to use it. I just want to know if it is used correctly. Of course, we should also know the principle. For example, tool training is like a worker who needs to operate. Internal audit training is like inspection. You may not know how to produce, but you should know how to verify whether it meets the requirements.