The English term for DDU is "Delivered Duty Unpaid (... named place of destination)", which means "Delivered Duty Unpaid (... named destination of destination)". It means that the seller will deliver the prepared goods at a place designated by the importing country, and must bear all the costs and risks of the goods shipped to the designated place (excluding customs duties, taxes and other official fees payable at the time of import), and must also bear Fees and risks for customs procedures.
The buyer must bear the additional costs and risks caused by the failure to handle the customs clearance of the goods in time.
To put it more bluntly, DDU terms, as long as the goods are not delivered to your customers, all the risks of loss of goods are borne by you.
Compared with the CIF terms, in addition to the increase in the cost of ocean freight and insurance, the arrival of goods at the port, port charges, and transportation charges to the door are all borne by you, which is more troublesome.
If the customer insists on being a DDU, then ask the several freight forwarders for the price to the customer's door, select the appropriate report to the customer, and the rest is to wait for the customer to reply.
The details of the fees involved in the DDU clause are relatively complicated. Confirm the price with the freight forwarder. Be sure to let the other party write a stamp and fax it to you, and ask if it is possible that additional fees may be incurred. Whether their agent at the destination port can get it .
DDP The English term for this term is Delivered Duty Paid, "Delivery after tax (... designated destination)" means that the seller has completed the import customs clearance procedures at the designated destination and will not be unloaded on the delivery and transportation DDP tool. The goods are delivered to the buyer to complete the delivery. The seller must bear all risks and costs of transporting the goods to the designated destination, including any "taxes" payable at the destination when customs procedures are required (including the responsibilities and risks of customs procedures, as well as the handling fees, Customs duties, taxes and other expenses). In EXW terminology, the seller bears the smallest responsibility, while in DDP terminology, the seller bears the greatest responsibility. If the seller cannot obtain an import license directly or indirectly, this term should not be used. However, if the parties wish to exclude all fees (such as value-added tax) that must be paid for imports from the seller ’s obligations, they should be clearly stated in the sales contract. If the parties want the buyer to bear the risks and costs of importing, the DDU term should be used.
The key to DDP's delivery after taxes is to see what payment method, what TT did not dare to do before 100% (and pay you the tariff and related fees).
  Log in to the customer's official website of the customer, first find the corresponding customs code, understand the tax there, of course, you can also find a freight forwarder to ask the tax there, you must provide real product information and value information, and let the freight forwarder Provide you with customs clearance fees and door-to-door fees (you need to provide a detailed consignee address) and other miscellaneous fees  DDP can do it, but when it comes to payment terms, all T / Ts are used.