Frequently Asked Questions

We are Dongguan Riddle Jewelry Co., Ltd. (Miduoduo), a professional stainless steel jewelry manufacturer with over 15 years of experience. We specialize in factory-direct wholesale, OEM/ODM, and cross-border supply for sellers on Shopify, Amazon, Etsy, and boutiques worldwide.

• Source Factory: No middleman. Own production lines.
• Huge Inventory: 10,000+ styles in stock.
• Low MOQ: Support dropshipping and small-batch customization.
• Original Design: 600+ new styles monthly.
• Content Support: High-quality photos and videos provided.

Yes, absolutely. We welcome creators, brand owners, and wholesalers to visit us in Dongguan. You can select products on-site or do live streams directly from our showroom to show real production transparency to your audience.

Yes. We provide professional factory-based dropshipping services. We support Blind Shipping (neutral packaging, no invoices) and Bulk Fulfillment for Shopify/Amazon sellers. We act as your behind-the-scenes factory partner.

Yes. All orders are fulfilled directly from our Dongguan factory warehouse. This ensures stable quality control and faster coordination. You sell. We produce, stock, pack, and ship.

Yes. We support real factory content to help you market your brand. We can provide factory introduction videos, production process videos, packing videos, and high-quality product photos for your TikTok/Reels content and Ad creatives.

Yes! We support full OEM/ODM services including Laser Engraving and Custom Design. Send us your specs to miduoduojewelry@gmail.com.

We use 18K Gold PVD (Physical Vapor Deposition) Coating. This high-tech process gives our stainless steel jewelry the beautiful, rich luster of real gold but is much more durable than traditional plating. It has passed the 1200-hour neutral salt spray test.

No. Most of our products are made from 316L Surgical Grade Stainless Steel. It is waterproof, hypoallergenic, and will NOT turn your skin green. Unlike brass, stainless steel contains chromium which prevents oxidation.

316L stainless steel contains a tiny trace amount of nickel essential for structure, but it is tightly bound and generally does not release onto the skin. It is considered hypoallergenic and safe for the vast majority of people.

We accept all major credit cards (Visa, Mastercard, American Express), PayPal, and Apple Pay. All transactions are secured by Shopify.

Processing: 24-48 hours for in-stock items.
Shipping: Typically 5-10 business days for US/UK/EU Priority lines. Express options available.

We offer specific Tax-Paid (DDP) shipping channels for USA, UK, Europe, and Mexico. If you choose a Tax-Included method and are still charged taxes, pay it first and send us the receipt for a refund.

For DDP/Tax-Included lines, tracking often shows 'Label Created' until the package clears customs in your country and is handed to the local carrier. This is normal. Please be patient.

Quality Issues: Contact us on the day of delivery with photos for a resend or refund.
Custom Items: Final sale.
Change of Mind: We generally do not support 7-day no-reason returns for bulk orders.