超硬材料概念再度拉升，黄河旋风2连板

Group 1 - The superhard materials sector has seen a resurgence, with Huanghe Xuanfeng achieving a consecutive two-day increase in stock price [2] - Huifeng Diamond's stock rose by over 10%, indicating strong market interest [2] - Other companies in the sector, including Power Diamond, Sifangda, Zhongbing Hongjian, and Guoji Jinggong, also experienced stock price increases [2]