If one of the ecshop orders is a shipping item, the entire order will be shipped.

If one of the ecshop orders is a shipping item, the entire order will be shipped.
1. Search "check whether all items in the shopping cart are free of freight, if yes, the freight is assigned to zero" by using the maid/lib_order.php.

$sql = 'SELECT count(*) FROM ' . $GLOBALS['ecs']->table('cart') . " WHERE  `session_id` = '" . SESS_ID. "' AND `extension_code` != 'package_buy' AND `is_shipping` = 0";

Change

$sql = 'SELECT count(*) FROM ' . $GLOBALS['ecs']->table('cart') . " WHERE  `session_id` = '" . SESS_ID. "' AND `extension_code` != 'package_buy' AND `is_shipping` = 1";

Then

$total['shipping_fee'] = ($shipping_count == 0 AND $weight_price['free_shipping'] == 1) ?0 :  shipping_fee($shipping_info['shipping_code'],$shipping_info['configure'], $weight_price['weight'], $total['goods_price'], $weight_price['number']);

Change

$total['shipping_fee'] = ($shipping_count >= 1 AND $weight_price['free_shipping'] == 1) ?0 :  shipping_fee($shipping_info['shipping_code'],$shipping_info['configure'], $weight_price['weight'], $total['goods_price'], $weight_price['number']);

That is, the whole shopping cart is free of postage as long as there is one item in the shopping cart.