Magento's Product custom attribute

template.phtml

<?php
echo $this->helper('Magento\Catalog\Helper\Output')->productAttribute($product, $product->getConfigGroupCpLabel(), 'config_group_cp_label');
echo $product->getData(ProductAttributesInterface::CONFIG_GROUP_CP_LABEL);
echo '<br>z: ';
echo $this->helper('Magento\Catalog\Helper\Output')->productAttribute($product, $product->getConfigGroupCpOrder(), 'config_group_cp_order');
echo $product->getData(ProductAttributesInterface::CONFIG_GROUP_CP_ORDER);
echo '<br>y: ';
echo $this->getProduct()->getAttributeText('config_group_cp_order');
echo $product->getAttributeText('config_group_cp_order');
echo '<br>x: ';
echo $this->getProduct()
    ->getResource()
    ->getAttributeRawValue(
            $product->getId(),
            'config_group_cp_order',
            $block->getStoreId()
    );
echo $product
    ->getResource()
    ->getAttributeRawValue(
            $product->getId(),
            'config_group_cp_order',
            $block->getStoreId()
    );
echo '<br>w: ';
echo $this->getProduct()
    ->getResource()
    ->getAttribute('config_group_cp_order')
    ->getSource()
    ->getOptionText(
    $product->getData('config_group_cp_order')
);
echo $product
    ->getResource()
    ->getAttribute('config_group_cp_order')
    ->getSource()
    ->getOptionText(
    $product->getData('config_group_cp_order')
);