39.9100° N, 116.4000° E
Beijing, Coordinates
40.4000° N, 3.6833° W
Madrid, Coordinates
38.8900° N, 77.0300° W
Washington, D.C., Coordinates
All fall under similar Latitude.
Got curious and subtracted: 116E - (3.6W + 77W ) = 36E
40 N 36 E returns Turkey.
[EDIT] Maybe hinting at Portugal...