Coffin 1 fortune 2 is reborn, or the mind or soul changes to another stage, and unhealthy bad habits are changed, leaving the old environment.
If you become a prime minister yourself, then you need to worry about national affairs, which means that you have a lot of troubles recently.
Writing your name on the coffin means that you are dead, and lying in the coffin means that you want to be reborn, forget these troubles and cheer up again.