the left part is character Field,
the right part is character Power
actually it is a plow.
Man is the one who is ploughing in the field. It is true, in the ancient time, only men took care of ploughing field. At that time, Ox were not trained to pull the plow, men had to pull the plow.
The character is an ideogram.
The bronze script of character Man is
Similar to shell bone script.
The big seal script of character Man is