How does China's potassium sulphate import-export landscape affect global trade?

How does China's potassium sulphate import-export landscape affect global trade?
China is both a major producer and consumer of potassium sulphate, but its export scale remains small due to domestic supply-first policies and export restrictions. Global potassium sulphate import trade grew from 974 million USD in 2019 to 1.125 billion USD in 2024. Key importers include the US, Australia, South Africa, the Netherlands, and Brazil. China's resource-based production, led by the Lop Nur facility, has reduced reliance on processing imported potassium chloride, which historically made domestic prices hostage to international MOP costs. The country's sulphate capacity is now sufficient for internal demand, with the Lop Nur site alone providing long-term resource security—estimated reserves of 250 million tonnes support over 160 years of extraction at current rates. Export restrictions, however, mean China remains a marginal player in global sulphate trade despite its production scale.