On this day, 98 years ago, on June 1, 1927 (May 2, 1927, the Japanese army landed in Qingdao on the grounds of protecting expatriates. On June 1, 1927, the 32nd Brigade of the Japanese Infantry Division in Manchuria landed in Qingdao on the grounds of protecting the safety of Japanese overseas Chinese. On the 2nd, the Beijing government sent a note to the Japanese Embassy in China, believing that "foreigners in Shandong have never been affected at all and there is no need to send troops to protect them." This time, your government suddenly sent troops to Qingdao without first seeking the consent of the China government and planned to go to Jinan as soon as possible. It cannot but be regarded as a violation of the treaty and a violation of sovereignty." Therefore, a formal protest was filed, demanding that Japan quickly stop sending troops to Qingdao; those who have already arrived should not land ashore immediately and return as soon as possible. Japan has 17,000 Japanese overseas Chinese and 150 million yen in investment along the Jinan, Qingdao and Jiaoji railways in Shandong. Shandong has a close relationship with the interests of Northeast China. In order to protect its special interests in North China and even Northeast China, and prevent Chiang Kai-shek and British and American forces from entering Japan's sphere of influence, the Japanese cabinet decided on May 24 to send troops to Shandong in the name of protecting Japanese overseas Chinese; so on the 27th, it decided to send troops from Northeast China to Shandong.