During the past 5 trading days (May 30th to June 5th), about 303 companies were researched by institutions in both markets. The types of research institutions show that 274 companies were researched by securities firms, accounting for 90.43% of the number of companies being researched. Fund companies researched 219 companies, ranking second, while 128 companies were studied by independent private research institutions, ranking third. In the institutional research list, a total of 77 companies received research from more than 20 institutions. Jiangshan oupai door industry was the most concerned, with 149 institutions participating in the research; wolong electric group was researched by 137 institutions, ranking second on the list; ygsoft inc., shanying international holdings and others were researched by 115 and 105 institutions, respectively.