通鼎互联：截至本公告日，控股股东通鼎集团累计质押股数约为3.55亿股

Group 1 - The core point of the article is that Tongding Interconnection (SZ 002491) announced the release and pledge of shares by its controlling shareholder, Tongding Group, with no change in the pledge ratio compared to previous disclosures [1] - As of the announcement date, Tongding Group has pledged approximately 355 million shares, accounting for 91.68% of its total holdings [1] - For the first half of 2025, Tongding Interconnection's revenue composition is as follows: 81.22% from the communication cable and related manufacturing industry, 9.24% from the communication equipment and related manufacturing industry, 7.91% from software and information technology services, and 1.64% from other businesses [1] - The current market capitalization of Tongding Interconnection is 6.9 billion yuan [1]