辉隆股份：公司全资孙公司中成科技位于硫铁矿带

Group 1 - The core viewpoint of the article is that Huillong Co., Ltd. (002556) has significant sulfur iron ore resources, with over 400 million tons of reserves in its county, ranking first in the province [1] Group 2 - The company's wholly-owned subsidiary, Zhongcheng Technology, is located in a sulfur iron ore belt, indicating a strategic advantage in resource availability [1] - The unique sulfur ore resources are highlighted as a key asset for the company, potentially enhancing its operational capabilities and market position [1]