The process for modifying or canceling an order depends on the order’s production status, and we need to balance customer needs and production efficiency. 1. Order modification: If the modification request is submitted within 24 hours after the order is confirmed and before production starts (e.g., adjusting the fiber count, jacket material, or delivery address), customers can send a written modification application to our sales team via email. The sales team will confirm the feasibility with the production department within 1 working day and reply to the customer (if the modification involves additional costs, the cost adjustment will be specified). Once confirmed, the order contract will be updated, and production will proceed according to the modified requirements. If production has already started, modification may not be possible (e.g., if the fiber has been drawn or the jacket has been extruded), and the sales team will provide alternative solutions (such as adding a new supplementary order). 2. Order cancellation: If cancellation is requested before production starts, customers need to submit a written cancellation application. After we confirm that no production materials have been procured, the advance payment (if any) will be refunded within 3 - 5 business days (a 5% administrative fee may be deducted for order processing costs). If production has started or materials have been procured, the cancellation fee will be calculated based on the progress: 30% of the total order value if production is less than 50% complete, and 50% if production is more than 50% complete. All modification and cancellation requests must be in writing (email or signed document) to avoid disputes, and the final confirmation will be sent to the customer via the order update notice.

Yes, we provide sample orders to help customers verify product performance before mass procurement. The terms for sample orders are as follows: 1. Sample scope: We can provide samples of all standard fiber products (such as 100m - long single - mode/multi - mode fiber cables) and simple customized samples (such as samples with LSZH jackets). Complex customized samples (such as special - parameter laser fibers) may require additional development costs. 2. Sample quantity: Generally, 1 - 2 pieces per product type are provided for free; for quantities exceeding 2 pieces, a reasonable sample fee (usually 50% of the mass production unit price) will be charged. 3. Sample fee refund: If the customer places a mass order (with a total value exceeding $10,000) within 3 months after receiving the samples, the sample fee paid will be fully refunded in the mass order payment. 4. Shipping cost: The customer is responsible for the shipping cost of sample orders. We can arrange shipment through the customer’s designated carrier or our cooperative express (DHL/FedEx) and collect the shipping cost in advance. 5. Lead time for samples: Standard product samples can be shipped within 2 - 3 business days; simple customized samples take 5 - 7 business days.

We cooperate with well - known international logistics carriers to ensure stable and efficient transportation. For small - batch shipments (weight below 50kg, volume below 0.5m³), we mainly use express services such as DHL, FedEx, and UPS, which usually take 3 - 7 business days to reach most countries/regions. For large - batch shipments (weight above 500kg or volume above 5m³), we cooperate with freight forwarders to provide sea freight (FCL/LCL) and air freight services: sea freight takes 20 - 40 days (depending on the destination port), and air freight takes 5 - 10 days. After the order is shipped, we will send a logistics confirmation email to the customer within 24 hours, including the carrier name, tracking number, and official tracking link (such as DHL’s official website or the freight forwarder’s tracking platform). Customers can enter the tracking number on the corresponding platform to check real - time logistics information (such as departure, transit, customs clearance, and delivery status). Our customer service team can also assist in querying logistics progress if there are delays or abnormal conditions.

The lead time varies based on product type and customization requirements. For standard fiber optic products (such as common single - mode/multi - mode cables, OM3/OM4 multi - mode fibers, and G.652 single - mode fibers) with sufficient stock, we can arrange shipment within 3 - 5 business days after receiving the advance payment. For standard products without stock, the lead time is 7 - 10 business days. For customized fiber optic products (including those with special jacket materials, non - standard fiber counts, or customized lengths), the lead time depends on the complexity of customization: simple customization (e.g., adjusting fiber count to 24/48 cores) takes 10 - 15 business days; complex customization (e.g., developing medical - grade fibers with special optical parameters or armored fibers for extreme environments) requires 20 - 30 business days, as it involves material procurement, sample testing, and mass production verification. We will provide a detailed delivery schedule in the order confirmation and update the production progress to customers weekly.

We support multiple flexible payment terms to meet the needs of different customers. For domestic orders, common payment methods include bank wire transfer (T/T), online bank payment, and letter of credit (L/C) for large - value orders (usually above $50,000). For international orders, we mainly accept T/T (with a 30% advance payment and 70% balance payment before shipment), L/C at sight, and PayPal for small - batch sample orders (below $5,000). In addition, for long - term cooperative customers with good credit records, we can discuss customized payment plans (such as monthly settlement) through our sales team to optimize cash flow for both parties. All payment processes will be confirmed in writing through the order contract to ensure transparency and security.