I strongly suspect that “anti-trust” is among the Party least concerns. Ma Yun (aka Jack Ma) had free rein over his businesses but abruptly disappeared from view for months after publicly criticizing Party policy. This activity concerning Ma Huateng may well be preventive efforts to remind businessmen that the Party is firmly in charge.
Xi Jinping and the Party leadership has methodically struck out at any possible potential challenge to his/their dominance. They have neutered already tame “official” churches, cracked down hard on unofficial churches, eliminated intra-party competitors on corruption charges, imprisioned Uyghurs wholesale, and aggressively tried to tame critics outside of mainland China through threats and intimidation.
This is just more of the same.
You will not criticize The Party.