calling to mind one's past sufferings and thinking over the source of the present happiness;recalling one's sufferings in the old society and contrasting them with the happiness in the new
憶苦思甜
recall bitterness in the old society and contrast it with happiness in the new China;recall past sorrows and savour present joys
憶苦思甜yì kǔ sī tián
回憶過去所吃的苦，想新社會的幸福生活給人民所帶來的甜美。contrast past misery with present happiness, recall the sorrows of the past and savour the joys of the present