What will be displayed by texting after being blacked out?

Nothing will be displayed. Sending a text message after being blacked out will not show anything in the past, and there will be no tips. If the other party is blacked out in the short message, or the other party blacklists you, there will be no hint. The other party's mobile phone can receive your short message, but it will be intercepted by the mobile phone, so you won't see this short message in the other party's short message list.