The document discusses the different stages and sample types in Manchu Times Fashion's (MTF) pre-production process. In the development stage, MTF focuses on product development and sample types like proto samples, color-run samples, and fit samples. In the production stage, factories are responsible for sample types like size set samples, pre-production samples, lab-test samples, and top samples, which are used to approve fitting, materials, and production runs. The document emphasizes cooperation between MTF and factories in upgrading technical knowledge and growing business together.