JWs believe Jesus was resurrected as a spirit creature Michael the archangel. However why he still called a man?
For there is one God, and one mediator between God and men, the man Christ Jesus;
His role on this earth was as a man, and he may properly be referred to in this way.
1 Corinthians 15:45-47
Thus, Jesus is both "a life-giving spirit" and "the second man".