On August 11, 1929, in the northern part of the Sea of Japan near the Soya Strait, the united German main fleet and the Japanese First Fleet met in the last battle, the outcome of the naval battle did not have any suspense, the Japanese fleet just let the German fleet enter the Soya Strait half a day late, at this time Deng6ku - floating astronomy - a nation with a long history and cultural tradition, this is a country with vast land and rich resources, here is the source and spread of Confucian culture, the people here are peace-loving, gentle and elegant, However, after entering the modern society, instead of being respected by other countries because of its elegance, this country has been ruthlessly invaded again and again, two opium wars, the invasion of China by the Eight-Nation Alliance, and the Sino-Japanese War, China has lost not only a lot of wealth and resources, but also the most precious - dignity.

In most parts of China, August usually means dizzying blazing sunshine and unbearable dryness, and in August 1929, the scorching heat from nature was as always, and with the Nanking government announcing the start of a large-scale rearmament war, the heat in people's hearts was overshadowed by patriotic and vengeful feelings.

Because of the rout of the Japanese navy and the increase in German military aid, the main ports along the eastern and southern coasts of China showed an unprecedented prosperity, and a large number of armaments and materials were continuously transported into China.

The 84th Army has about 300 divisions and a total strength of 2.2 million troops, not including a considerable number of local garrison units, which was the National Revolutionary Army before large-scale reorganization.

Although the number of this army is huge, the quality of its officers and men is uneven, and many of them have been formed by surrender and integration, and the combat effectiveness and cohesion of the troops do not allow for optimism.

In accordance with the army reorganization plan and the suggestions of the German military advisers, the Nanjing government has carried out a unified reorganization of the National Revolutionary Army, and the original 300 6 army divisions will be combined into 140 infantry divisions, six armored divisions, and some local garrison units; although the number of division-level units has been greatly reduced, the strength and firepower of a single infantry division have been greatly improved, and the history of only a few thousand soldiers and a few mountain artillery pieces in a division will be gone forever, and the total number of government troops will remain at about 1.75 million. This will be the country with the largest standing army in the world outside of Germany.

By the end of August, more than 27oo German officers on active duty had guided the training of the Chinese army at 36 bases in China; in addition to teaching Chinese officers and men in the use of German-style weapons, they would also teach these eastern colleagues the tactical regulations and combat experience of the German Sixth Army. The Air Force of the National Revolutionary Army, formed with the assistance of Germany, already had three fighter groups and three bomber groups, and although there was still a serious shortage of pilots, especially skilled pilots, the Chinese Air Force at this time was already close in size to the aviation units of the Japanese Kwantung Army.