That study statistics seem questionable at best just so to say the US should have universal health care. A lack of policy is not the same as enacting a policy, especially one that is supposed to emulate past USSR actions which they knew at the time led to millions of dead. This makes it hard to say the CCP didn't know what would happen.
Later when it was found out mass starvation to the point of wide spread cannibalism was happening they would not stop, yet continue sending their troops to steal the peasant's food and execute anyone who resisted.
We also of course have Mao quoted as saying "Death has benefits; fertilizer is created", "Half of China may well have to die", as many other quotes showing they weren't really interested in the millions that will die.
This culminating in 30 million dead in 4 years, which if we take your study at face value will take the US 100 years to achieve through "poverty related deaths", which even communist utopias have.
Regarding the Cultural Revolution I assume you agree this was intentional murder of a million+, although you seemed to challenge that in my original posting. Our current discussion seem to focus on intent even though I said "killing" which usually does imply reduced intent.
Regarding the Great Leap Forward, I do believe the CCP would prefer no deaths, and a lot of the deaths relate to strongman idiotic ideas without challenge, as is endemic in ideological totalitarian societies. However, I believe they fully knew what they were going into, without taking into account the refusal to stop, and therefore these were horrendous crimes.