108 years ago today, August 14, 1917 (June 27, 1917 in the lunar calendar), China officially declared war on Germany and Austria. 100,000 participating troops gathered in Qingdao to prepare to go to the European battlefield. On August 14, 1917, the Beijing government issued the "Presidential Proclamation", officially declaring war on Germany and Austria. The notice said: "Our government of the Republic of China used Germany to implement a submarine program, which violated international public law and endangered the lives and property of the people of neutral countries. On February 9 this year, it lodged a protest with the German government and stated that if the protest was invalid, it would have to sever diplomatic relations with Germany. After the unexpected protest, his submarine plan changed many times. Ships of neutral countries and merchant ships of belligerent countries were destroyed, increasing in number... So on March 14, he announced the severance of diplomatic relations to the German government, and announced the situation to China and foreign countries... Austria, which adopts the same policy as Germany, has never changed its course. Not only violating public law, but also harming our people, our government is deeply committed to doing good, but it is hopeless. Since 10 a.m. on August 14, the 6th year of the Republic of China, Germany and Austria have been declared at war. All previous treaties, other international clauses and international agreements concluded between our country and Germany and Austria that are related to China, Germany and China will be repealed in accordance with public international law and practice." On the same day, the Ministry of Foreign Affairs issued a note to the envoys of all Allied countries and neutral countries in China, as well as the representatives of Germany in Beijing and the Minister of Austria in China, announcing that China would declare war on Germany and Austria. The envoys of the United States, Britain, France, Japan, Italy, Russia and other countries immediately replied to the Ministry of Foreign Affairs, welcoming China's participation in the war. In his reply, the Austrian Minister stated: "This declaration of war, which I believe violates the Constitution, will be regarded as invalid. According to the wise opinion of the former President of Lebanon, this declaration of war must be approved by both houses of Parliament before it can be implemented." The Ministry of Foreign Affairs believed that China and Austria were already enemy countries and could not accept this official document, so it immediately returned the official document to the Austrian Minister. The Beijing government set up a prisoner of war shelter in Haidian to commemorate the war