直奉战争期间，张作霖与吴佩孚举行会谈 (1号为张作霖，2号为张宗昌，3号为吴佩孚，4号为张学良) During the Jilbengpung War, the meeting between Zhang Zuorin and Wu Peifu was held (No. 1 is Zuolin Zhang , No. 2 is Zongchang Zhang , No. 3 is Wu Peifu , and No. 4 is Zhang Xueliang )