Having the longitude but not the latitude is very troublesome, for the longitude that Li Wen reported was 15.1748657, and this longitude runs through the entirety of Europa and all through Africa.
So, searching by longitude could traverse from Northern Europe through Southern Europe, and then cut through North Africa, Central Africa, and South Africa.
Sun Ping was the picture of dejection as he whispered bitterly, "Why didn't I specify Africa first instead of reporting the coordinates directly?"
If he had mentioned Africa directly, the search area would have significantly narrowed. However, reporting only the longitude far from being helpful to the recipient, actually led to confusion.
For this longitude crosses the Alps.
According to previous intelligence, the Ark of the Covenant was hidden within the Alps.