Yeah this guy is basically wrong in every single way imaginable. The Chinese government is often quoted with saying 18 million people died under Mao, and independent scholars have arrived at estimates of around 25 million. There is no way to reconcile the disconnect between wha China's population should have been in 1964 based on the 1953 census without the Great Leap Forward. Also remember that te Chinese census was not very reliable during this period, so it had a margin of error of around 20 million, but it still showed a clear decline. Also there were around 40 million less births than you would expect, which is hard to explain without a famine. There are also eyewitness accounts of the famine from every province in China.

Also this author thinks the mass mobilization steel campaigns were great for industrializing china but many Chinese peasants worked on them for very little pay for more than 30 hours a week. This gave them hardly any time to farm. Mao made it clear to local cadres that he wanted to see progress in steel production and irrigation projects during the Great Leap Forward, and the local cadres were under so much pressure to perform they literally worked people to death. There are both official Chinese records of This as well as peasant anecdotes.

Basically this guy is about as credible as a holocaust denier.