After you receive the goods, please confirm that the product is complete at the first time, and if you have any questions, contact our customer service staff in time.
According to your needs, we will send the COA report in electronic or paper form.
According to the characteristics and purity of the product, you can test it yourself. After confirming that it is correct, please contact our customer service staff to issue an invoice for you.
Peter
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18515031260
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