He Zhuguo
On December 8, 1932, the Kwantung Army stationed in Jinzhou bombarded Yuguan (ie Shanhaiguan) with armored vehicles. When He Zhuguo came forward to negotiate, Japan asked He Zhuguo to admit that the bombardment was a misunderstanding, asked He Zhuguo to stop anti-Japanese actions, and again proposed the creation of a buffer zone. Otherwise, Japan will send troops to occupy Shanhaiguan, and even Beiping and Tianjin. Zhang Xueliang immediately dispatched troops to reinforce He Zhuguo.