In the past 5 trading days (October 21 to October 25), about 138 companies in both markets were surveyed by institutions. The types of survey institutions show that securities companies conducted surveys on 132 companies, with securities companies participating in 95.65% of the listed companies' survey activities; fund companies surveyed 108 companies, ranking second; sunresin new materials surveyed 83 companies, ranking third. In the institutional survey rankings, 75 companies were surveyed by more than 20 institutions. Yantai China Pet Foods received the most attention, with 225 institutions participating in the survey; Sunresin New Materials was surveyed by 214 institutions, ranking second on the list; Jinzai Food Group, Shanghai Bright Power Semiconductor Co., Ltd., and others were surveyed by 206, 183 institutions respectively.