According to Databao statistics, there are more than 700 institutional research companies in the past week, and carbon nanotube leader Tiannai Technology has become the stock with the largest number of research institutions, with a total of 440 institutions investigating the company. Other stocks with a large number of research institutions include Antu Biology, Guoxuan High-Tech, Hengxuan Technology, etc., all of which have more than 100 research institutions. It is worth mentioning that the new Zebang, Jiang Special Motor and other lithium industry chain also has more than 100 institutions to investigate. (Securities Times)