Shen Jiming lived to be 90 years old. He was so tired of living that he finally gave up.
Etc! What on earth has he done in this life? It seems like he can't remember anything... So, he was reborn?
No, it's not rebirth, it's going backwards. If a person's life spans from infancy to sunset, then Shen Jiming's life spans from old age to toddlerhood. Watching the frail body gradually grow stronger, watching the people who left around me come back one by one, rediscovering the frivolity of youth, rediscovering the heartbeat of ignorance, how does it feel to regain what was lost?
Is this life worth it, going forward or backward?