Group 1 - The stock price of Huitong Group closed at 6.22 yuan on August 4, down 0.13 yuan, a decrease of 2.05% from the previous trading day [1] - The opening price on August 4 was 6.26 yuan, with a highest price of 6.40 yuan and a lowest price of 6.13 yuan, with a trading volume of 233,100 hands and a transaction amount of 146 million yuan [1] - On August 4, around 9:37 AM, Huitong Group's stock price experienced a rapid rebound, increasing over 2% within 5 minutes, reaching a price of 6.31 yuan with a transaction amount of 28.15 million yuan [1] Group 2 - Huitong Group's main business includes highway, municipal, and housing construction engineering, with its registered location in Hebei Province [1] - The company operates within the engineering construction sector, involving concepts related to the Hebei region and new urbanization [1] Group 3 - On August 4, the net outflow of main funds was 1.3752 million yuan, accounting for 0.05% of the circulating market value [1] - Over the past five trading days, the cumulative net inflow of main funds was 21.5692 million yuan, representing 0.75% of the circulating market value [1]