一、根据海关规定，再生铝进口报关需要准备以下资料：

According to customs regulations, the following documents need to be prepared for import declaration:

1. Certificate of Origin: For countries that have signed free trade agreements with China, preferential certificate of origin can be obtained.

原产地证明：对于与中国签署自贸协定的国家，可以获得特惠产地证明。

2. Bill of Lading: Applicable to ocean bill of lading B/L.

提单：适用于海运提单B/L。

3. Packing list and foreign trade contract: A packing list is a document that provides a detailed description of the packaging and of goods. A foreign trade contract is a contract related to import business.

装箱单、外贸合同：装箱单是详细描述货物包装情况和数量的文件，外贸合同是与进口业务相关的合同。

4. Commercial invoice: Commercial invoice is an important document in commercial transactions, used to prove the value of goods.

商业发票：商业发票是商业交易中的重要文件，用于证明货物的价值。

5. Customs Registration Certificate: This is the registration certificate of the importer with the Chinese customs.

海关注册登记证：这是进口商在中国海关的注册证明。

6. Label translation/three in one label: The label needs to indicate ingredients, content, and other information, and also needs to be translated into Chinese.

标签翻译件/三合一标签：标签上需要标明成分、含量等信息，还需要翻译成中文。

The above is the information required forimport customs declaration. The specific re may vary depending on countries, regions, and policies. It is recommended to consult us before importing to understand the latest re and regulations.

以上是再生铝进口报关所需的资料，具体要求可能会因国家、地区和政策的不同而有所差异，建议在进口前咨询我们 了解Zui新的要求和规定。