The problem now depends on De Jong, whether he wants to join the Chelsea team or not because De Jong also rejected Manchester United for the same thing. So I'm also confused as to why he turned it down and just wants to stay at Barcelona with a pay cut and less playing time. So I think it would be a stupid move if De Jong still turned down Chelsea with that amount of offer.
De Jong refuses to take a pay cut, so he will be the highest paid player in Barcelona and will receive a full salary
As for playing time, this will obviously not be a problem either, since it is impossible to keep the most expensive player on the bench. Well, if Barcelona cannot register some newcomers, then in fact they will have no choice.