As early as 6000 years ago, our ancestors firstly exploited Dalian region. In Qin and Han period (221B.C.-220A.D.), Dalian region was under the jurisdiction of Liaodong County. In the early period of Tang Dynasty (618-907), Dalian region was under the jurisdiction of Andong Prefecture in Jili state, and in Liao Dynasty (916-1125), it was under the jurisdiction of Dong Jing Tong Liaoyang County. Dalian was named Sanshan in the period of Weijin (220-420), San Shanpu in Tang Dynasty (618-907), Sanshan Seaport in Ming Dynasty (1368-1644) and Qing Niwakou in Qing Dynasty (1644-1911). In the 1880's, Qing government constructed loading bridges and fortifications with built-in cannons, and set up mine camps in the northern coast of Dalian gulf, making it become a small town.After the invasion and occupation of Russia, the city was called Qing Niwa and was renamed Dalian in 1899.During the 1st and 2nd Opium War, Dalian was invaded and harassed by the British army. As the main battlefield of the Sino-Japanese War of 1894-1895 and Japanese-Russian War, Dalian suffered great calamity in these two wars in modern history. Consequently, Dalian became Russian and Japanese colony for nearly half a century, meanwhile under the Japanese colonial rule for 40 years. The unconditional surrender of Japan on August of 1945 marks the liberation of Dalian in the anti-fascist war, thus ends 40 years'colonial rule over the city. On September of the same year, the Preparatory Committee of Dalian Workers' Union was founded. On October, the northeast bureau of the Communist Party of China appointed Mr. Hanguan secretary of the CPC Dalian Committee, and the CPC Dalian Committee and Dalian municipal government were founded. From 1949 to 1956, the socialist transformation was almost finished. From 1957 to 1966, the all-around socialist construction started. From 1966 to 1976, Dalian experienced the Cultural Revolution. After 1976, Dalian entered the new period of socialist modernization construction. In 1984, Dalian was approved by the State Council to be the coastal open-up city and was designated as the city with separate economic plan in 1985, enjoying provincial level decision-making authority.