Shipping & Returns

Our Shipping Policy

Domestic Shipping (China)

International Shipping

We proudly serve researchers and pharmaceutical partners across 69 countries worldwide, including:

•  United States

•  United Kingdom

•  Germany

•  France

•  Japan

•  Australia

•  Canada

•  Brazil

•  India

•  South Korea

•  Spain

•  Italy

• And many more…

Note: Delivery times are estimates and may vary due to customs clearance, holidays, or unforeseen delays.

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Shipping Methods & Carriers

We partner with trusted international couriers to ensure reliable delivery:

• DHL Express – Fast, trackable international shipping

• FedEx – Reliable global delivery with tracking

• UPS – Comprehensive international coverage

• EMS – Cost-effective international shipping option

• Specialized Cold Chain Logistics – For temperature-sensitive peptides (available upon request)

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Packaging Standards

Your peptides arrive in optimal condition through our professional packaging:

• Lyophilized Peptides: Sealed in sterile vials, packaged with desiccants, and protected in insulated shipping containers

• Temperature Control: Ice packs and thermal insulation for temperature-sensitive shipments

• Discreet Packaging: Professional, secure packaging with no external product labels

• Documentation: All orders include Certificates of Analysis and customs documentation

• Tracking: Every shipment includes a tracking number for real-time monitoring

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Shipping Costs

Shipping costs are calculated based on:

• Order weight and dimensions

• Destination country

• Selected shipping method

• Insurance coverage

Free Shipping: Available for orders above a certain threshold (contact our sales team for details).

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Customs, Duties & Taxes

International customers please note:

• Import duties, taxes, and customs fees are not included in the product price or shipping cost

• These charges are the responsibility of the recipient

• Customs policies vary by country; please check with your local customs office

• We provide complete documentation to facilitate customs clearance

• We are not responsible for delays caused by customs processing

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Order Processing Time

• Standard Orders: Processed within 1-2 business days

• Bulk Orders: Processing time varies; contact our sales team for estimated timelines

• Custom Synthesis Orders: Lead time depends on sequence complexity; discussed during consultation

• Orders Placed on Weekends/Holidays: Processed on the next business day

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Order Tracking

Once your order ships, you’ll receive:

•  A shipping confirmation email with tracking number

•  A link to track your package in real-time

•  SMS notifications (where available)

•  Customer support for any shipping questions

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Our Returns Policy

Quality Guarantee

At Chengdu Kaijie, we stand behind the quality of every peptide we manufacture. Our GMP-certified production and rigorous quality control ensure you receive only the highest-purity peptides for your research. If you’re not satisfied with your purchase, we’re here to help.

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Returns Eligibility

You may request a return or exchange under the following conditions:

Important: Peptides are temperature-sensitive research materials. We cannot accept returns on opened, reconstituted, or improperly stored products.

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Return Process

Step 1: Contact our customer service team within 14 days of receiving your order

• Email: [Insert Email]

• Phone: [Insert Phone]

• Please include your order number and photos of the issue

Step 2: Our team will review your request and provide a Return Merchandise Authorization (RMA) number

Step 3: Package the product securely in its original packaging

Step 4: Ship the product back to us using a trackable shipping method

Step 5: Upon receipt and inspection, we will process your refund or replacement

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Damaged or Defective Products

If your peptide arrives damaged or appears defective:

1. Document the damage – Take clear photos of the packaging and product

2. Contact us immediately – Reach out within 48 hours of delivery

3. Retain all packaging – Keep the original shipping materials for inspection

4. We’ll resolve quickly – We’ll arrange a replacement or refund promptly

Note: Please do not use damaged peptides for research purposes.

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Refund Processing

• Refunds are processed within 5-10 business days of receiving and inspecting returned products

• Refunds are issued to the original payment method

• Shipping costs are non-refundable unless the error was ours

• International returns may be subject to customs fees; these are the customer’s responsibility

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Cancellation Policy