The terrain of Tiewei Mountain was very special.
If one observed Tiewei Mountain, one would see a huge special terrain being composed of annular mountain ranges.
The annular mountain ranges contained a large number of hematites which contained high iron content. Therefore, many mountain ranges of Tiewei Mountain looked maroon.
The annular mountain ranges were regularly distributed. Over millions of square miles, there were 6 loops of annular mountain ranges from the center to the periphery of Tiewei Mountain like rings on the target.
Such a special terrain could be simply and regularly named in military geography.
When treating Tiewei Mountain as a huge dial, its north direction was 0 o'clock; its south direction was 6 o'clock; its west direction was 9 o'clock; its east direction was 3 o'clock.
