1. You need to register a legal enterprise, including the business license and organization code certificate, which will ensure the legal operation of the OEM production of bottled water.

2. Make sure that you have a unique trademark for branding bottled water products. You can protect your trademark rights by applying for a trademark registration certificate from the State Trademark Office.

3. If you plan to produce bottled water by yourself and then brand it, you need to apply for the corresponding production license and hygiene license. If you choose to entrust processing to produce bottled water, you need to sign an agreement with the processing factory and go through the formalities of entrusting processing for the record.

4. If the bottled water product belongs to QS certification, you need to submit the product information to the quality and technical supervision department for filing.