An article from COMAC, Chairman of COMAC talking about work in 2022. It does not say anything about targeting end of 2022. He does however have the following words "在后续的型号工作中,希望大家做到‘一切为了
取证交付,一切围绕
取证交付,一切服务
取证交付’". It translates as "in the following word, I wish everybody do everything for
certification and delivery". He emphasized it three times.
It seems that certification and delivery (first commercial) is indeed same thing in COMAC's mind/plan/perspective.
Of course, without specifically saying "targeting 2022 certification", everything is just a guess or wish.