To gather tuition fees for her daughter, Zhou Suhua came to the Wancheng Shoe Factory, which promised eighty cents per pair, but discovered that behind the so-called high piece-rate wages lay layers of deductions: qualified shoes were judged defective, piece-rate wages were cancelled, and material fees were even deducted in reverse. Quality inspector Su Lanying noticed that the same batch of shoes was defective when money was deducted, but became genuine when boxed, so she secretly kept the payroll, outbound delivery orders, glue batches, and shift records. After workshop safety issues were exposed, the boss attempted to shirk responsibility, and the two restored the truth with complete evidence. In the end, the deducted wages were retroactively reimbursed item by item, the workshop completed its rectification, and the public and transparent new rules also put every qualified shoe back onto the workers' accounts.