益生股份：12月销售白羽肉鸡苗6174.34万只

Group 1 - The core viewpoint of the article is that Yisheng Co., Ltd. reported significant changes in sales figures for its products in December 2025, indicating a mixed performance across different segments [1] Group 2 - Yisheng Co., Ltd. sold 61.7434 million white feather broiler chicks, generating sales revenue of 260 million yuan, with year-on-year changes of 39.55% and 43.32%, respectively, and quarter-on-quarter changes of 20.09% and 20.6% [1] - The sales of Yisheng 909 small white feather broiler chicks amounted to 6.4143 million, with sales revenue of 7.0809 million yuan, showing year-on-year changes of 7.62% and -6.27%, and quarter-on-quarter changes of -22.07% and -6.84% [1] - In terms of breeding pigs, the company sold 3,345 heads, with sales revenue of 774.2 thousand yuan, reflecting year-on-year changes of -42.85% and -44.82%, and quarter-on-quarter changes of -69.95% and -75.76% [1]