Practical ability does not mean that it can be formed naturally with theory, but is usually combined with actual combat. Psychology will greatly affect the play.
Of course, theory is the foundation. Within three days, whether it is the guidance of the tutor or the on-site practice and assessment, the purpose is to familiarize the students with the theory and process.
Solution: New employees will continue to follow up after joining the company, give appropriate guidance to the problems found, and help new employees analyze and solve the problems.