SHANGHAI, Feb 25 (SMM) - As of February 25, the zinc ingot inventory across the seven major regions in China totalled 276,400 mt, up 7,500 mt from Monday February 21 and up 13,300 mt from last Friday February 18, according to SMM data. The inventories in Shanghai increased significantly as smelters increased their shipments to the region and the increase in downstream demand was less than expected. In contrast, the inventory in Guangdong declined as demand continued to improve amid downstream production resumption and as fewer cargoes arrived. In Tianjin, the inventory continued to increase amid large arrivals and modest downstream restocking. The total inventories across Shanghai, Guangdong, and Tianjin rose by 15,600 mt from February 18.