The limited production of ishia zed is located in the village of feng zhenggang, nan yankang commune, hebei province. The registration authority is the business and industry administration of lingshou county, represented by zhu shenggang. It operates in the areas of sands, cylindrites, electrical stones, volcanic rocks, quartz sand processing and sale; masonry, calcium powder, rock tablets, wheatstones, pebbles, high-mounted land, expansion soil, silicate soil, heavy crystals, sea boulders, skates, long stones, beads, pearls, neon, mineral fibres, graphite