I think you'll find these answers useful
https://www.reddit.com/r/AskHistorians/comments/8ej8gv/can_mao_be_blamed_for_the_disaster_that_was_the/
https://amp.reddit.com/r/AskHistorians/comments/2gm6hk/what_was_chinas_great_leap_forward_and_why_did/