Group 1 - The core transaction involved 50,000 shares of Changcheng Military Industry, with a total transaction amount of 2.2245 million yuan, representing 0.38% of the total trading volume for the day [1] - The transaction price was 44.49 yuan, which was consistent with the market closing price of 44.49 yuan [1] - The buying brokerage was Guolian Minsheng Securities Co., Ltd., while the selling brokerage was CITIC Securities Co., Ltd. Shanghai Branch [2]