This document specifies the terms and definitions of Baicao modified nylon 6 fiber or Baicao modified nylon 66 fiber, product classification, technical requirements, inspection methods, marking, packaging, transportation and storage requirements. This document is suitable for using nylon 6 or nylon 66 slices as the matrix and Baicao as the functional modified material to produce natural, semi-matt, and glossy nylon 6 fiber or nylon 66 fiber with a linear density between 0.89dtex and 300.0dtex. Other specifications, Types of nylon fiber can be used for reference.