The relationship between Germany and Austria dates back centuries, and the historical and cultural ties between the two countries are complex and close. First of all, from a cultural and linguistic point of view, Germany and Austria share a common linguistic foundation and deep cultural traditions. German is the official language of both countries, and there is a rich exchange between the two countries in literature, ** and the arts. Austria, for example, as the center of the Habsburg Empire, had a profound impact on European history and culture. 
Historically, the relationship between Germany and Austria has been inextricably linked. Both countries were once part of the Holy Roman Empire and the Austro-Hungarian Empire, sharing the historical memory of these vast states. However, the most striking were the events of the 30s of the 20th century, when Germany annexed Austria, as it was called"anschluss"。This event marked the political close union of Germany and Austria, although this union was devastating, as Austria became part of Nazi Germany until the end of World War II. On the economic front, Germany and Austria also cooperate very closely. Germany is Austria's largest partner, and there are frequent exchanges between the two countries. Many German companies have set up branches or subsidiaries in Austria, further strengthening the economic ties between the two countries. As member states of the European Union, Germany and Austria cooperate extensively in the political, economic and legal fields. This cooperation has not only promoted the economic prosperity of both sides, but also strengthened the friendship and understanding between the two peoples. 
Despite the close ties between Germany and Austria, there are also some historical and cultural differences between the two countries. Austria, for example, struggled to break away from its past Nazi past after World War II and develop into an autonomous, independent country. This effort has largely shaped Austria today, making it an open, free and democratic country. 
In short, the relationship between Germany and Austria is complex and close. Despite some historical and cultural differences between the two countries, their economic, political, and cultural cooperation is still very close. Such close ties will not only help promote the prosperity and development of the two countries, but also help strengthen the friendship and understanding between the two peoples.