金瑞矿业(600714.SH)：公司30万吨天青石精选项目目前尚在前期工作阶段

Group 1 - The core viewpoint of the article is that Jinrui Mining (600714.SH) is currently in the preliminary work phase for its 300,000-tonne selected limestone project [1] Group 2 - The company has communicated this information through its investor interaction platform [1] - The project involves a significant volume of 300,000 tonnes, indicating a potentially large-scale operation [1] - The current status of the project is still in the early stages, suggesting that further developments are expected in the future [1]