Core Insights - The total number of grandparent stock updates in November 2025 was 197,000 sets, a month-on-month decrease of 3.9% but a year-on-year increase of 18.67% [3] - From January to November 2025, the total updates amounted to 1.3312 million sets, reflecting a year-on-year decline of 9.61% [5] Group 1: Update Trends - The grandparent stock updates showed a continuous increase in the second half of 2025, with a total of 501,100 sets in the first half, down 37.01% year-on-year [3] - The updates from July to September totaled 418,100 sets, with October at 205,000 sets and November at 197,000 sets [3] Group 2: Update Sources - The updates in 2025 were primarily from domestic breeding and imports, with the first eleven months seeing 60% from domestic sources and 40% from imports [10] - The imported varieties included AA+, Ross, and Lifen, while domestic breeds included Cobb, SZ901, and Guangming No. 2 [10] Group 3: Update Distribution by Variety - The total updates from January to November included Cobb at 361,500 sets, AA+ at 205,200 sets, and Lifen at 256,000 sets [6] - The market share for the varieties was Cobb at 27.2%, AA+ at 15.4%, and Lifen at 19.2% [6] Group 4: Company Market Share - A total of 18 companies were involved in grandparent stock updates, with Yisheng occupying the largest share at 236,000 sets, representing 17.7% [11] - Other notable companies included Fujian Shengze at 227,000 sets (17.1%) and Beijing Poultry Breeding at 10.5% [11] Group 5: Future Projections - The grandparent stock updates for 2025 are expected to exceed 1.45 million sets [13]