受中东部地区寒潮天气影响，京广和京沪线部分旅客列车晚点、停运

Group 1 - The article reports that due to a cold wave affecting the central and eastern regions of China, some passenger trains on the Jingguang and Jinghu lines managed by the Beijing Railway Bureau are experiencing delays and cancellations [1] - The railway department advises travelers to check the China Railway 12306 website or station announcements for timely updates and to plan their travel accordingly [1] - Passengers who have purchased tickets for canceled trains can apply for refunds without incurring fees within 30 days from the date of the scheduled departure [1]