Group 1 - The core stock price of Delong Huineng on July 31 closed at 6.25 yuan, a decrease of 0.16 yuan from the previous trading day [1] - The opening price on the same day was 6.38 yuan, with a highest point of 6.41 yuan and a lowest point of 6.22 yuan, resulting in a total trading volume of 73,118 hands and a transaction amount of 46 million yuan [1] - The net outflow of main funds for Delong Huineng on July 31 was 2.3935 million yuan, with a current total market value of 2.241 billion yuan, and the circulating market value is the same as the total market value [1] Group 2 - Delong Huineng's main business involves urban gas supply, gas engineering construction, and installation, operating in the Sichuan region [1]