What are the problems in carrying forward the spirit of Lei Feng and carrying out the activity of "learning from Lei Feng"?

The problems existing in learning from Lei Feng are:

First, go through the motions like Lei Feng.

Second, the connotation of Lei Feng's spirit is misunderstood.

Third, I think Lei Feng's spirit is out of date.

Fourth, learning from Lei Feng's good behavior will make him a defendant.