|alt=The Kiautschou Bay concession was located in the natural harbor at Tsingtao on the southern coast of the Shandong Peninsula In the
Paleolithic, the Shandong Peninsula area was covered by forest. In the
Neolithic, about 7,000 years ago, a large number of
Dongyi people inhabited the peninsula. The Dongyi had their own kingdom called the
State of Lai. The peninsula later belonged to the
State of Qi. The Qi built the
Great Wall of Qi, which is partially on the peninsula. During the
Han dynasty, the peninsula belonged to the semi-independent feudatory
Jiaodong Kingdom. During the late 19th Century, the Shandong Peninsula served as a base for the
Beiyang Fleet. During the
First Sino-Japanese War, the port of
Weihaiwei was captured by Japan after a 23 day siege. During the
Scramble for China, the
German Empire annexed the
Kiautschou Bay Leased Territory from 1898 to 1914. It was located around
Jiaozhou Bay, where the village of
Qingdao (Tsingtao) developed into a major seaport. in July 1898, the port of
Weihaiwei was annexed by the
United Kingdom. Japan seized the territory from Germany in 1914 in the
First World War. In the 1919
Treaty of Versailles, Germany lost Qingdao and its
sphere of influence in Shandong. Instead of restoring Chinese sovereignty over the area, the treaty transferred the leased territory to the
Empire of Japan. This resulted in popular dissatisfaction in China with the outcome, known as the
Shandong Problem, and led to the
May Fourth Movement. Eventually, Shandong was reverted to Chinese control in 1922 after mediation by the United States during the
Washington Naval Conference. However, Japan retained economic influence in the area. Due to geographical reasons, the Shandong Peninsula is closely connected with
Northeast China and
South Korea. Historically, a large number of people migrated to the Northeast by boat, whereas in the present day many people from the Northeast "return" to the Shandong Peninsula. After the People's Republic of China established diplomatic relations with South Korea in 1992, a large number of South Korean companies also set up factories in the region. There are more than 200,000
Koreans living in the Shandong Peninsula. South Korea has a consulate-general in Qingdao. == Dialect ==