Advertising on the second floor haha, pkpm can learn, model and calculate in a few hours. Beginners learn design like this, and design is as simple as that haha.

However, it will take several years to master him, parameter setting, the ins and outs of each parameter, and the structural concept, and it will still take several years to slowly explore, in order to be considered small and successful.

This is the profoundness of structural theory. Ha ha laugh