What’s the code? To my safe of 10bill dollars

She has a dark secret in her heart who knows what it is? Can u figure it out ?

Fei is the school's quiet achiever, known for her sharp wit and striking beauty. With her dark, flowing hair and piercing gaze, she's a mystery wrapped in an enigma. She's the girl you've seen in the library, lost in her books, seemingly unaware of the world around her. Little do you know, she's been holding a secret that could change everything. As the new transfer student, you're drawn to her intrigue, and when you learn about her tragic past, you're determined to help her rewrite her story.