油气开采及服务板块延续调整，贝肯能源、准油股份跌停价开盘

Group 1 - The oil and gas extraction and service sector continues to adjust, with companies such as Beiken Energy (002828) and Zhun Oil Co. (002207) opening at the limit down price [1] - Tongyuan Petroleum (300164) and Zhongman Petroleum (603619) experienced declines of over 7% [1] - Other companies like Intercontinental Oil & Gas (600759) and Blue Flame Holdings (000968) also opened lower [1]