How can I keep up a max health?

I set a player's max health. but when I leave the game and reconnect, the max health has removed. how can I keep up it?

 

set it onJoin

PHP:

public function onJoin(PlayerJoinEvent $event) {
$player->setMaxHealth(40);
}


set prefix to solved

 

but I need to set a maxhealth by command or action

 

You can create a config to store their maxhealth data
(Sorry for bad English)

 

set it again on PlayerJoinEvent