房地产、建材板块反复活跃，京投发展、韩建河山3连板

Group 1 - The real estate and building materials sectors are experiencing repeated activity, with companies such as Jingtou Development and Hanjian Heshan achieving three consecutive trading limits [1] - Other companies including Tubao, Jianlang Hardware, Sankeshu, Chengtou Holdings, Jintou Chengkai, and China Wuyi are also seeing upward trends [1]