On February 4, 1922, China was forced to sign the "Resolution of Shandong Suspension Regulations."On February 4, 1922, China signed the "Resolution of Shandong Suspension Regulations" and the "Additional Agreement."The main contents: (1) the lease of Qingdao was returned to China, opened as a trading port; (2) the German public goods were returned to China, the Japanese possessors were recovered at a low price; (3) the Japanese military withdrew within six months; (4) the Qingdao Customs, Cigarettes, and Qingdao's seabed line was returned to China; (5) the Qingdao Salt Field and Qingdao Southern Radio were redeemed by China; (6) the Qingdao Road was redeemed by China, but the Japanese were mainly involved