Like the article says it's all about erasing the past,
The Red Guards, enforced Mao's objective to rid the nation of what he called The Four Olds: Old Ideas, Old Culture, Old Customs, and Old Habits.
It's always–like Mao–every 2, 3, 5 years. A new campaign and new fancy terms. And the state media lies every day until that [new campaign] becomes a truth accepted by the public."
Like the article says it's all about erasing the past,
Unity - Criticism - Unity (belonging, inclusion). Common tactics used on the common people explained by James Lindsay here: Mao, Criticism, Unity