Unicom mobile phone sets up call forwarding and transfers it to other mobile phones. I will send a text message to Unicom's mobile phone. Can he see it?

Of course, call forwarding is only transferred to another mobile phone when someone calls you, and it has no effect on SMS.

But I still advise you not to set it like that, because it will still cost your phone bill, and the cost is higher than the general cost. This function is just an emergency, for example, if your mobile phone is lost, don't worry.