Refer to the HS code that regulatory Affair advised as below table, There is HS code 3206.19 must pay 5% for import duty. If we use Form E will be reduced to 0%.
On Form E that Shantou provided to Ampacet it shown only Hs code 3206.49 all product items.
So, if possible, please ask Shantou to provide Form E with HS code 3206.19 under product code as the red in next shipment.