Mao is still considered a great leader in China. His portrait appears on literally all Chinese banknotes in the current series (https://en.wikipedia.org/wiki/Fifth_series_of_the_renminbi).
Sarah Paine EP 3: How Mao Conquered China (Lecture & Interview) https://www.youtube.com/watch?v=4l3Sa8ImGFQ&t=6325s
You should't believe everything you read. Especially when it comes from a secret service.