The 100-year-old Gulangyu Museum is one of the most interesting museums on the island, showing old objects brought to Gulangyu by consulates from their respective countries. The most impressive thing is the refrigerator (physical freezer) that doesn't use electricity in Germany. There is also a washing machine that doesn't use electricity, and the German punch card machine more than 100 years ago (the Germans used to work rigorously) are super interesting. There are also porcelain, musical instruments and the like brought by the West. Former cameras, spy machines, 250 coins.