Group 1 - In the past month (from March 23 to April 22), 18 companies listed on the Beijing Stock Exchange (BSE) were investigated by institutions, with Minshida being the most notable, receiving attention from 139 institutions [1] - The types of institutions conducting the research included 17 brokerages, 14 funds, 13 private equity firms, 10 insurance companies, and 2 overseas institutions [1] - The companies that received the most institutional attention were Minshida, Yizhi Moyu, Litong Technology, and Audiwei, with 139, 137, 77, and 65 institutions participating in their investigations, respectively [1] Group 2 - The average stock price of the companies investigated by institutions increased by 16.14% over the past month, with notable increases from Yizhi Moyu (154.56%), Minshida (74.82%), and Jikang Instruments (28.51%) [2] - The average daily turnover rate for the investigated companies was 7.51%, with the highest rates recorded for Zhongke Meiling (17.38%), Minshida (16.18%), and Guohang Yuanyang (15.31%) [2] - As of April 22, the average market capitalization of all companies on the BSE was 2.89 billion yuan, while the average market capitalization of the investigated companies was 3.30 billion yuan, with Hualing Co., Minshida, and Fujida leading in market value [2]