Group 1 - The feed sector experienced a decline of 0.59% on January 20, with Tianma Technology leading the drop [1] - The Shanghai Composite Index closed at 4113.65, down 0.01%, while the Shenzhen Component Index closed at 14155.63, down 0.97% [1] - Notable gainers in the feed sector included Aonong Biological, which rose by 3.08% to a closing price of 4.35, and Kesi Thought, which increased by 1.66% to 7.94 [1] Group 2 - Tianma Technology saw a significant decline of 3.57%, closing at 15.66, with a trading volume of 162,400 shares and a transaction value of 258 million [2] - Other notable decliners included Jin Xin Nong, down 2.14% to 6.41, and Peidi Co., down 1.59% to 19.15 [2] - The feed sector experienced a net outflow of 35.44 million from main funds, while retail investors saw a net inflow of 20.64 million [2] Group 3 - Aonong Biological had a net inflow of 27.32 million from main funds, representing 7.51% of its trading volume, while it faced a net outflow of 14.44 million from retail investors [3] - The net inflow for Guai Bao Pet was 9.77 million from main funds, with a net outflow of 1.67 million from retail investors [3] - The overall trend showed that while main funds were withdrawing, retail investors were actively buying into certain stocks within the feed sector [3]