In the bombing sequence during the opening of The Last Jedi, there is a secret Han Solo message. The Last Jedi happens shortly after The Force Awakens, so Han's death is still fresh in the minds of the Resistance, likely leading to some of the bombers painting messages like this on their bombs prior to being evacuated: thus it is no surprise that one of the bombs has "Han says hi" painted on it in Aurebesh, one of the most used languages in Star Wars' galaxy.
