TGCF fan community

Still don't quite understand how Mei Nianqing survive as long as Jun Wu looking as young as he did. Was it because he was made a deputy by Jun Wu when he first ascended and as long as Jun Wu has spiritual power to share, MNQ gets to have it? Wouldn't Jun Wu know he was still alive? Wouldn't he choose not to share more power and let him deteriorate through time? Why keep him alive?
Or is there another reason I don't know about.