水平分表怎么获取关联

protected $table = 'xs_users0';
protected $autoWriteTimestamp = 'datetime';\
protected $updateTime = false;\
protected $createTime = 'create_time';\
\
//获取水平分表具体哪张\
public function setTable($table) {\
$this->table = $table;\
return $this;\
}\
\
//关注\
public function followUser() {\
return $this->hasMany(Follow::class, 'user_id', 'id');\
}

//粉丝\
public function fanUser() {\
return $this->hasMany(Fan::class, 'user_id', 'id');\
}

粉丝关注水平分表，关注表有多张，return $this->hasMany(Follow::class, 'user_id', 'id');怎么实现具体关联