中鼎股份涨2.35%，成交额7.25亿元，主力资金净流入3469.29万元

Group 1 - The core viewpoint of the news highlights the recent performance and financial metrics of Zhongding Sealing Parts Co., Ltd, including stock price movements and trading volumes [1][2]. - Zhongding's stock price increased by 77.95% year-to-date, with a recent 3.45% rise over the last five trading days and a 42.38% increase over the last 60 days [1]. - The company reported a revenue of 9.846 billion yuan for the first half of 2025, reflecting a year-on-year growth of 1.83%, and a net profit of 817 million yuan, which is a 14.11% increase compared to the previous year [2]. Group 2 - Zhongding's main business involves the research, production, and sales of sealing parts and special rubber products across various industries, with revenue contributions from cooling systems (26.47%), intelligent chassis-rubber business (20.74%), sealing systems (19.72%), and others [2]. - The company has distributed a total of 2.672 billion yuan in dividends since its A-share listing, with 724 million yuan distributed over the past three years [3]. - As of June 30, 2025, the number of shareholders decreased by 0.18% to 101,400, while the average circulating shares per person increased by 0.18% to 12,966 shares [2].