Help me about load a chunk

how to load chunk at a specific location, even when no player is there, that area can still work, can someone help me

 

PHP:

# $level instanceof \pocketmine\level\Level
$level->loadChunk($x, $z);


 

How do i get the x,z

 

PHP:

/** @var \pocketmine\math\Vector3 $pos */
$chunkX = $pos->x >> 4;
$chunkZ = $pos->z >> 4;

/** @var \pocketmine\level\Level $level */
$level->loadChunk($chunkX, $chunkZ);