Here is one example of such a forced confession:
My shortcomings are very serious; they are unpardonable. I am ashamed, but I beg you nevertheless to continue helping me correct my fault[s]. My mistakes show that I have not understood the aim of the great Cultural Revolution and that I don’t have enough love for Mao. All my life I must study Mao’s sayings with determination and love the Party with all my heart.
Here is another:
And here is another: