01. Order Processing

After payment confirmation and any necessary order verification, orders are normally prepared within 2–4 business days.

During holidays, promotions, or periods of unusually high order volume, preparation may require up to 5 business days.

Processing time and carrier transit time are separate periods.

02. Estimated U.S. Delivery

For standard shipping to supported United States addresses, the estimated carrier transit period is generally 10–15 business days after dispatch.

Delivery estimates are expected ranges rather than guaranteed arrival dates. Carrier disruption, weather, holidays, customs procedures, remote destinations, or other circumstances may affect actual delivery.

Where delivery outside the United States is available, applicable shipping information will be shown during checkout or provided with the order.

03. Shipping Charges

Available shipping services and applicable shipping charges are calculated and displayed during checkout according to the destination and available shipping method.

You can review the applicable shipping cost before completing payment.

04. Fulfillment & Shipping Origin

Depending on inventory availability, product location, and delivery destination, orders may be fulfilled from our facilities or designated fulfillment partners.

For this reason, the physical origin appearing on a parcel may differ from the registered business address of Sancai Zhiyuan (Shenzhen) Technology Co., Ltd.

Products from the same order may occasionally travel separately and may receive separate tracking numbers.

05. Tracking Your Shipment

Once an order has been dispatched and tracking information becomes available, a shipping confirmation containing tracking details will normally be sent to the email address entered at checkout.

A carrier may require some time after label creation before the first tracking movement appears.

06. Shipping Address Changes

Please review your delivery address carefully before submitting your order.

If you discover an error after ordering, contact service@oacmasl.com as soon as possible. We will make reasonable efforts to update the address before fulfillment begins, but an address change cannot be guaranteed after processing or shipment preparation has started.

Reasonable reshipping costs may apply where an incorrect or incomplete address supplied by the customer results in a package being returned and shipped again.

07. Delayed or Inactive Tracking

If tracking has not updated for an extended period or the shipment appears significantly delayed, contact us with your order number.

We will review available shipment information and, where appropriate, work with the carrier or fulfillment provider to investigate the situation.

08. Lost Shipments

If a package appears to be lost while in transit, please contact customer support. After available tracking information and shipment circumstances have been reviewed, we will provide an appropriate replacement, refund, reshipment, or other reasonable solution where the loss is confirmed.

09. Tracking Says “Delivered” but the Package Is Missing

Where appropriate, first check the delivery area, mailbox, household members, building reception, neighbors, and the carrier.

A carrier's “Delivered” status does not automatically prevent us from reviewing a delivery claim. If the parcel still cannot be located, contact us with your order number so that the circumstances can be reviewed.

10. Damaged, Defective, Incomplete, or Incorrect Items

Contact us promptly if your order arrives damaged, defective, incomplete, incorrect, or materially different from its product description.

Please provide your order number and relevant photographs or videos where appropriate. Once an issue attributable to us has been reviewed and confirmed, we will provide an appropriate replacement, refund, reshipment, or return solution without requiring you to bear additional costs resulting from that error.

11. International Duties & Import Charges

Where international delivery is available, the destination may impose customs duties, import taxes, brokerage fees, or similar charges.

Unless checkout clearly states that these charges are included, government- or carrier-imposed import costs may be the recipient's responsibility.

12. Shipping Assistance

For shipping, tracking, delay, or delivery questions, contact service@oacmasl.com.