According to the net zero land consumption stipulated in the European Green Deal, Berlin will no longer expand outwards and land resources will become tight. Under such circumstances, the construction of new places often leads to the demolition of old places, and many of the demolished places contained public memories and were of great significance to people. Therefore, it is hoped that the city can accommodate more spaces and activities through venue sharing. As a time-operated building, the train station can use its vacancy period to carry out other activities. In order to fit in with its operating cycle and at the same time protect Berlin's declining characteristic cultural industry, the night live is chosen to use the train station during its vacancy period. However, the night live has its unique needs, and the common station space cannot fully meet the needs of the night live and realize the conversion of different programs.

Based on the above statement, the research question is proposed, which is how to switch a train station to a night live venue during its vacancy period?

The design results are divided into three parts. The first part is the metro station used during the day. In this part, while realizing the normal operation of the basic programs of the station, adjustments to the space and programs are made based on the elements and needs of the night live, while optimizing the user experience in the day, so that the station can meet users’ expectations beyond efficiency. The second part is the night live venue used at night. In this part, adjustments are made to the parts that cannot be satisfied by the original space of the metro station, the adjusted space should be able to adapt to the programs of the night live and utilize the benefits brought by the unique characteristics of station space to optimize its experience. The third part is about how the two building types can be converted into each other. Starting from space, facilities and management, a complete conversion process is designed to answer the research question.

In the 17th century, both Amsterdam and Suzhou were in a period of rapid social and economic development. When faced with similar water environment and social problems such as conflicts between population and limited land resource, the residents of the two places chose completely different ways to build their dwellings. In response to such differences, this study explores the reasons for the differences between the traditional waterfront dwellings in Amsterdam and Suzhou in the 17th century. First of all, the study describes the social conditions at that time and the development processes of waterfront dwellings in the two places to construct a basic historical framework. Then it interprets the specific differences in the respective relationships between the two waterfront dwellings and the water environment, indicating the objective architectural differences. Next, it analyzes the reasons for forming the specific differences from three aspects which are social culture, lifestyle, natural environment and climate, and reveals the influence of these factors on the results of architectural form differentiation. Finally, starting from the reasons for the differences, further thinking about the current architectural practice is carried out, so as to bring some enlightenment to the readers.