In the past 5 trading days (from August 29th to September 4th), about 495 companies in the two markets were surveyed by institutions. The types of survey institutions show that securities companies conducted surveys on a total of 479 companies, accounting for 96.77% of the listed companies' survey activities with the participation of securities companies. Fund companies surveyed 410 companies, ranking second; Sunshine private placement institutions surveyed 312 companies, ranking third. In the list of institutional surveys, a total of 274 companies received surveys from more than 20 institutions. Shenzhen Mindray Bio-medical Electronics received the most attention, with the participation of 495 institutions in the survey; Montage Technology was surveyed by 376 institutions, ranking second in the list; United Imaging Medical and Shenzhen New Industries were surveyed by 312 and 301 institutions respectively.