现行统一人教版高中历史教材《中国古代史》(选修)全一册第125页中讲到:在朱棣打败建文帝后,“改元永乐,改北平为北京”,北京为京师。在现行统一高中历史教材人教版《中国近代现代史》(必修)下册第4页注释③中讲“1928年6月8日,北伐部队进入北京。21日,南京国民政府改直隶省为 The current Unified PEP version of the senior high school history textbook “Ancient Chinese History” (elective) is written on page 125 of the first volume of the book: After Zhu Xi defeated Jianwen Emperor, “Yuanyuan of Changyuan was changed to Beijing,” and Beijing was the capital. In Notes 3 on the fourth page of the current Unified Senior High School History textbook PEP “Modern History of China” (Compulsory), “The Northern Expedition entered Beijing on June 8, 1928. On the 21st, the Nanjing National Government changed to Zhili Province. for