There is an old man who comes to the park every day to replace the pavement blocks. He selects the places where the ground is slightly sunken and makes them flat.
It is a task that requires some skill. Perhaps this old man was a pavement block installation technician in his old days. The places where his hands have touched are very clean.
It does not seem like anyone ordered or forced him.
Nevertheless, he is crouching down and concentrating on the pavement blocks today as if he were a monk on a mission.
The sight is so awe-inspiring that I am even careful to take a picture.
