The translation should be something like:
"The hexagram Qian: the Nine-Five line represents the dragon in flight; an advantageous divination for meeting important persons."
'Qian' is the first of the 64 hexagrams in the Yijing, represented by six horizontal unbroken lines and reflecting the strongest yang energy among the 64. Hence it is used to symbolise heaven and the emperor. The fifth (middle) line is called the Nine-Five line, because nine is the largest odd number within the first ten numbers, and the odd numbers are considered to be yang. As the Nine-Five line is the most auspicious line in the Qian hexagram, the emperor is referred to as the Lord of the Nine-Five.
This Chinese-language article is my source for the above: http://www.huaxia.co...c/00264856.html
Since I'm hardly versed in the complexities of the Yijing, I'd welcome clarifications or corrections from our Yijing experts here.

Thanks Yun for the explanation and the link to the chinese article. It really answers my query. Basically I should put forth again what's exactly explained in that article.
Why is the Emperor referred to as the 'Jiu Wu Zhi Zun" (the respected nine-five)?
And what does nine-five (Jiu Wu) mean?
There are two explanations:
Explanation 1 - Basic Ancient Chinese Number InterpretationIn ancient chinese number system, those odd numbers are referred to as the
Yang numbers while those even numbers are referred to as the
Yin numbers. "Nine" is the highest odd number and "Five" is the middle of the Yang Number series, so naturally, "nine-five" is used to referred to the 'highest", if not, the most power person, the Emperor.
Explanation 2 - Yi-Jing's interpretationIn I-Ching or Yi-Jing (book of change), there existed the so-called "8 Diagrams (more specifically Trigrams )" known in chinese as
Bagua 八卦. Each Diagram has a particular name and is represented by 6 lines (known in chinese as
Yao 爻). There are altogether 8 diagrams with different 6-lines combination (some broken and some unbroken).
These 8 diagrams can be combined with one another to form new different
hexagrams. 8 x 8 = 64 different combinations = 64 hexagrams. Each of these 64 hexagrams represent a phenomenon and meaning in the world and is used for divinations.
Now, "Qian 乾" hexagram is the 1st of the 64 hexagrams and it happens to be a symbol of heaven, thus it is used to represent the "Emperor". The Qian hexagram is made up of 6 lines, and the 5th line (counting from bottom to top) is called "Nine-Five" line ("Nine" represents
Yang as in the "Yang" number series, while "Five" represents the "fifth" line). The "Nine-Five" line is the best and most auspicious line in the Qian hexagram, and Qian hexagram is the 1st in the 64 hexagrams. This would mean the "Nine-Five" line is the "no. 1 line" in the 384 lines of the 64 hexagrams, and is thus a representation of the highest person, the Emperor.