Qingdao Metro Line 3 May 4th Square Station. According to Baidu map, the new version of Qingdao Metro Transfer Concert Hall is located at May 4th Square Station of Qingdao Metro Line 3. May 4th Square Station, located at the intersection of Hong Kong Middle Road and Shandong Road in Qingdao, Shandong Province, China, is a subway station managed and operated by Qingdao Metro Group Co., Ltd., and also a transfer station between Qingdao Metro Line 2 and Qingdao Metro Line 3.