大中矿业：接受广发证券等投资者调研

Group 1 - The core viewpoint of the article is that Dazhong Mining (SZ 001203) has engaged with investors through a research meeting, highlighting its business focus and revenue structure [2][3] - Dazhong Mining's revenue for the first half of 2025 is predominantly from the iron ore mining sector, accounting for 99.7% of total revenue, with other businesses contributing only 0.3% [2]