Buying copper cathodes 99,97, CIF China

We would like to buy copper cathode, purity 99.97% - 99.99%.
Quantity: 20,000 metric tons on an annual basis.
Price: CIF (USD)
Final destination: Shanghai.
Purpose: Manufacturing use
Payment method: 100% L/C
Our goal is to establish a long-term and mutually beneficial cooperation. Therefore, we kindly ask you to provide us with your best offer.