To self-postage a return to China, you can use a courier service such as DHL, FedEx, or UPS to arrange for a return shipping label. You can contact the courier service directly or use their online platforms to create and purchase a return shipping label. Once you have the label, you can affix it to your package and drop it off at a designated drop-off location or schedule a pick-up. Make sure to carefully follow the courier service's instructions and regulations for international shipping to ensure a smooth return process. **

Postage is the fee paid for sending mail or packages through a postal service. It is the cost associated with the delivery of the item to its intended recipient. Postage rates can vary based on factors such as the weight, size, and destination of the item being sent. Postage can be paid through various methods, such as purchasing stamps, using online postage services, or paying at the post office counter. **

To stick self-printed postage onto a letter, you can use a glue stick or double-sided tape to adhere the printed postage label onto the envelope. Make sure the label is securely attached and that the barcode and postage amount are clearly visible. Additionally, be sure to place the label in the designated area on the envelope to ensure proper processing by the postal service. **

There is no physical proof of postage when using online postage because the postage is typically purchased and printed directly from a computer or mobile device. The proof of postage is instead stored electronically in the form of a tracking number or barcode, which can be used to track the package's journey and delivery status. This electronic proof of postage is considered just as valid as a physical proof of postage and is widely accepted by postal services and shipping carriers. Additionally, using electronic postage eliminates the need for physical stamps and allows for more efficient and convenient shipping processes. **

The postage required for mailing a letter or package depends on the weight, size, and destination of the item. Different postal services have their own rates and guidelines for determining the appropriate postage. It is important to check with the postal service or use their online postage calculators to determine the correct amount of postage needed to ensure the item reaches its destination without any issues. **

Return postage refers to the cost of shipping an item back to the sender or original sender. This is typically used in situations where a recipient needs to return an item to the sender, such as in the case of a product return or exchange. The return postage cost is usually paid for by the sender or included in the return shipping label. It is important to consider return postage when sending items that may need to be returned, as it can impact the overall cost of the transaction. **

The postage necessary for mailing a letter or package depends on its weight, size, and destination. The United States Postal Service (USPS) has different postage rates for domestic and international mail, as well as for different types of mail such as letters, large envelopes, and packages. To determine the necessary postage, it is important to weigh the item and check the USPS website or visit a post office to calculate the correct postage based on the specific mailing requirements. **

To ensure that your mail reaches its destination, it is important to affix sufficient postage. This means that you need to attach the correct amount of postage to cover the cost of mailing your item. If you do not affix sufficient postage, your mail may be returned to you or the recipient may be required to pay the remaining postage upon delivery. It is important to check the current postage rates and guidelines to ensure that you are using the correct amount of postage for your mail. **