In the past 5 trading days (October 29 to November 4), about 541 companies in both markets were surveyed by institutions. The types of survey institutions show that securities companies surveyed a total of 525 companies, with 97.04% of listed companies having the participation of securities companies in survey activities; fund companies surveyed 445 companies, ranking second; private equity institutions surveyed 358 companies, ranking third. In the institutional survey ranking, a total of 306 companies were surveyed by 20 or more institutions. Shenzhen mindray bio-medical electronics received the most attention, with participation from 569 institutions; luxshare precision industry was surveyed by 417 institutions, ranking second on the list; zhejiang crystal-optech, united imaging healthcare, and others were surveyed by 325 and 310 institutions respectively.