What does 999.9 square feet of silver mean?
Shang Qi Jewelry Company produces 999.9%10,000 ft silver. "999.9 square feet of silver" refers to10,000 feet of silver with a purity of 999.9% produced by Shang Qi Jewelry Company. "sq" is the manufacturer code or brand code, which stands for Shang Qi Jewelry. And "Zuyin 999.9" represents metallic silver with a silver content of 99.99%.