Navigation warning! Military Mission in the Northern part of the Yellow Sea in the Bohai Strait, 28 May, Liao Aviation Police 107 check 23, the northern part of the Yellow Sea in the Bohai Strait, from 1600 on 28 May to 1600 on 4 June, carried out military missions within the range of 38-51.7N121-38.2e, 38-34.2N121-38.2e, 38-33.9N121-07.9e and 38-48.2N121-14.1e. No Entry.