As a divinatory line, nine at the second place of Oppression reads within the hexagram's overall concern with one in straits may yet find progress and success; for the firm and correct, the truly great man, there is good fortune and no error, though his words will not be believed. The line occupies a place that does not match its own nature in the classical doctrine that odd places favour a firm, yang line and even places favour a yielding, yin line. It is also one of the two central lines of the hexagram, the place classical reading treats as the most balanced regardless of the line's own character. Its own text, that straitened amid wine and food, yet the red knee covers of a ruler come to him in time, and it will be well for him to maintain the sincerity proper to sacrifice, is the particular fortune assigned to this one stage of the situation, not to the hexagram as a whole.
The second line corresponds by classical convention with the fifth line, and the two do not correspond here, since both lines share the same character. Read together with the trigram it belongs to, Kan in the lower position of the figure, the line marks the situation settling into its own character, still wholly inside the lower trigram, one stage in the six stage movement the hexagram traces from its first line to its last.
A change at this line, from yang to its opposite, is the mechanism the tradition uses to move from one hexagram to another. Flipping the second line of Oppression turns Kan into Kun while the other trigram, Dui, stays as it is, which yields Oppression's changing partner, Gathering Together (King Wen 45), the hexagram this line is recorded as transforming into.