//修改check out shipping field
add_action( 'woocommerce_before_checkout_shipping_form', 'add_shipping_type$("#shipping_first_name,#shipping_last_name,#shipping_city,#shipping_company").fadeIn();} else
.
$shipping_packages = $woocommerce->cart->get_shipping_packages();// Get the WC_Shipping_Zones instance object for the first package
$shipping_zone = $woocommerce->wc_get_shipping_zone