SHANGHAI, Mar 16 (SMM) - As of March 10, the inventory of lead concentrates at Lianyungang port stood at 16,000 mt. Closed import window and the CNY break caused stocks at this port to drop slightly in February. The TCs of imported lead concentrates fell slightly after the CNY holiday, leading to scarce trades. The import window was still closed, even as the SHFE/LME lead price ratio rebounded from a low level in January-February.