@oristarA,
Original: The exposure of Mr. Zhang’s faked credentials provoked a fresh round of hand-wringing over what many scholars and Chinese complain are the dishonest practices that permeate society, including students who cheat on college entrance exams, scholars who promote fake or unoriginal research, and dairy companies that sell poisoned milk to infants.
Quote:Yes, I've a better sense in understanding the use of "that" than "what." It is clearer.
Does it mean?
concern over practices that (that certain people say) are widespread and bad.
Not just concern. 'handwringing' denotes false concern, people overreacting, "my oh my, the sky is falling" type people.
Paraphrased: The exposure of Mr. Zhang’s faked credentials provoked a fresh round of people overreacting, complaining about those things that many scholars and Chinese complain are the dishonest practices that permeate society, including students who cheat on college entrance exams, scholars who promote fake or unoriginal research, and dairy companies that sell poisoned milk to infants.