The Run-Down Workshop, Who Exactly Is My Dad? is a 3D realistic suspense comic set in a bygone era. At forty, after being laid off, Chen Qizhou returns to his hometown to sell the factory and raise 320,000 yuan for his mother's hospital deposit. The buyer has his eyes on only one thing: an old lathe in the corner, covered with an oilcloth. His father used it for half his life, and despite sitting idle for two years, it hasn't developed a single spot of rust. On the back of an account book is a line of writing: This lathe is to be left for him. When he turns forty, he will come back and start it up. The signature is dated 2003, the year he was seventeen. When an offer of eight million yuan arrives, he goes from selling the factory to protecting it. Following his father's letters, the words 'Don't become like me,' and a key with an empty slot, he discovers that the man he has called Dad for forty years is someone he doesn't know at all. The mysteries keep unfolding, leaving a lasting impact.