科达制造：第一大股东梁桐灿累计质押约2.63亿股

Group 1 - The core point of the article is that Keda Manufacturing (SH 600499) announced the pledge and unpledge of shares by its major shareholder, Liang Tongcan, affecting a significant portion of the company's total shares [1] - Liang Tongcan has unpledged and re-pledged approximately 263 million shares, which accounts for 70.1% of his holdings and 13.69% of the company's total share capital [1] - As of August 25, 2025, Liang Tongcan and his concerted party, Guangdong Hongyu Group, hold about 439 million shares, representing 22.88% of the total share capital, with a total of 327 million shares pledged, which is 74.49% of their holdings and 17.04% of the total share capital [1] Group 2 - For the fiscal year 2024, Keda Manufacturing's revenue composition is as follows: 53.32% from the machinery equipment industry, 37.42% from the overseas ceramics industry, 6.99% from lithium battery materials, 2.19% from other equipment, and 0.08% from other businesses [1] - The current market capitalization of Keda Manufacturing is 22.7 billion yuan [1]