Not everyone cries when they're sad. Not everyone's blood runs bright red.
He won't let anyone see his pain in a way that makes it look ridiculous. He doesn't want anyone to see him covered in blood.
Oh, ignore him. This is just the inner monologue of someone with every comfort in life, amusing himself because he's lonely.
Lin Shuyu.
An ordinary man living in the imperial capital. More or less ordinary, anyway.