Looking for Copper millberry scrap 300 mtpm

We are a leading copper scrap importer in China. Annual demands over 300,000 tons. Here is some items that we are looking for; Here is some demand information for your reference.

1. Millberry- 200 to 300 mt per month

2. Berry Candy: 500-800mt per month

3. Birch Cliff: 800-1000 mt per month

4. Motor Birch: 500-800 mt per month

5. New Enamel Birch: 200 mt per month

6. Brass Honey (1-3% attachments): 1000 mt per month.  

Have you ever export to China? Can I have any evidence to assure your experience and ability?  2% PB SGS report at discharging port is a must for L/C nogotiation.