30倍大牛股股价回落60%，控股股东拟增持股份

Group 1 - The core point of the article is that Huicheng Environmental Protection's controlling shareholder plans to increase their stake in the company, with an investment amount between 25 million and 50 million RMB [1] - The company's stock price has experienced significant volatility, reaching a low of 7.96 RMB in April 2022 and a high of 251.55 RMB in July 2025, representing a maximum increase of 30 times over less than four years [3] - Despite the strong stock performance, the company's financial results have been relatively average, and some of its previously planned fundraising projects did not meet expected benefits [3] Group 2 - The announcement of the share buyback comes after the company's stock price has fallen by 60% from its peak [3] - A new fundraising plan was approved in December of the previous year, indicating ongoing efforts to improve the company's financial situation [3]