Group 1 - The core issue involves 57 depositors in Luliang County, Shanxi Province, who lost a total of 11.8 million yuan due to purchasing high-risk financial products recommended by fake "salespeople" at a bank branch [1] - A joint investigation team has been established by the Luliang County government to look into the case, considering past investigations and new information from victims [1] - The three individuals involved in the fraudulent activities were not bank employees, and there is no evidence linking the purchased financial products to the bank [1] Group 2 - Legal experts indicate that whether the bank should bear joint liability for compensation depends on the causal relationship between the bank's failure to exercise due diligence and the depositors' losses [2] - Depositors may pursue legal action against the bank on the grounds of "safety guarantee obligation infringement," but they face challenges in providing evidence and protecting their rights [2]