When was Qinhuangdao separated from Tangshan?

19 12 After Sun Yat-sen became president, he visited Shanhaiguan Bridge Factory in Qinhuangdao as the governor of the national railway. The economy here has developed to a certain extent, railways and ports have been basically completed and put into operation, and Hua Yao Glass Factory was established in 1922. During the Zhifu War, Zhang Zuo Lin sent Zhang Xueliang to Qinhuangdao for peace talks, but the result was frustrated and he went to war at Shanhaiguan. 1932 beidaihe summer resort established coastal autonomous region. 1945, Linyi county Committee and county government were established. 1948 65438+On February 27th, Qinhuangdao was liberated and Zhongmu Municipal Committee (located in Shanhaiguan) was formally established. 1949 was changed to Qinhuangdao City in March, and it is under the Tangshan District Administrative Office, with its organization located in Changli County. In May, 198 1, Qinhuangdao City, Funing County, Changli County and lulong county resumed their original organizational systems. Qinhuangdao City has jurisdiction over three districts: Haigang, Beidaihe and Shanhaiguan, and each city and county belongs to Tangshan area of Hebei Province. 1May, 983, Tangshan area was abolished and the system of city governing county was implemented. Lulong county, Changli, Funing and Qinglong counties are under the jurisdiction of Qinhuangdao City. 14 In April, 1984, Qinhuangdao was identified by the State Council as one of the national14 coastal cities. 1987 In May, with the approval of the State Council, Qinglong Manchu Autonomous County was formally established.