[Shanghai Stock Exchange issues supervisory warning to Longban Media and relevant responsible persons] On September 4, the Shanghai Stock Exchange announced that it was found that the semi-annual report previously disclosed by Longban Media did not fully explain the specific revenue scale, proportion and actual impact on the company's operating performance of the AI ​​video business, and the information disclosure failed to accurately reflect the actual development of the relevant business; the information disclosure on the revenue of the AI ​​video business in the stock trading abnormal fluctuation announcement and the risk warning announcement was inconsistent. The company's inaccurate information disclosure, insufficient risk disclosure, and inconsistent disclosure may mislead investors in their decision-making. The Shanghai Stock Exchange issued regulatory warnings to Heilongjiang Publishing and Media Co., Ltd. and Sun Fujun, then secretary of the board of directors.