Yantai received German economic activities and investments for about 20 years. In the run-up to the First World War, its trade continued to grow but was limited by the poor roads of the area's hinterland and the necessity of using pack animals for portage. The trade items remained largely the same as before. After the Germans were defeated by Allied forces in World War I, Qingdao and Yantai were occupied by the Japanese, who turned Yantai into a summer station for their Asian fleet. They also set up a trading establishment in the town. The different foreign influences that shaped this city are explored at the Yantai Museum, which used to be a guild hall. However, the city's colourful history has not left a distinctive architectural mark, there has never been a foreign concession, and though there are a few grand 19th-century European buildings, most of the town is of much more recent origin. After 1949, the town's name was changed from Chefoo to Yantai, and it was opened to the world as an ice-free trade port in 1984.