Nine in the Fourth is the fourth line of Progress, a yang line in a yin position (out of place), at the bottom of the upper trigram Li (Fire). 'Progressing like a hamster' — the 鼫鼠 (a large rodent, sometimes translated as hamster or marmot) symbolizes someone who advances through hoarding, cunning, and operating in darkness rather than light.
This is the only genuinely negative line in Progress, and it stands as a stark warning: advancement achieved through improper means is inherently dangerous and unsustainable. The hamster works in the dark, hoards resources, and avoids the light — the exact opposite of the sun-over-earth imagery that defines this hexagram.
As the card depicts — a shadowy figure laden with ill-gotten goods, moving furtively in the darkness while the sun rises around them. The light that brings progress to the virtuous exposes the corruption of the dishonest.