鲁银投资：山东发展计划增持公司股份4000万元～8000万元

Group 1 - The core point of the article is that Shandong Development plans to increase its stake in Luyin Investment by investing between 40 million to 80 million yuan within six months through the Shanghai Stock Exchange [1] - Before this increase, Shandong Development holds approximately 214 million shares of Luyin Investment, accounting for 31.66% of the total share capital [1] - As of the report, Luyin Investment has a market capitalization of 4.3 billion yuan [1] Group 2 - For the first half of 2025, Luyin Investment's revenue composition is as follows: Salt industry accounts for 49.45%, New materials account for 47.56%, Trade accounts for 3.09%, New energy accounts for 1.74%, and Other industries account for 0.34% [1]