The original BKS is a self-report scale contained 17 items mainly covering advantages of exclusive breastfeeding and knowledge breastfeeding skills in Chinese version. The modified BKQ is a 5 point Likert scale to score each question with 5 meaning extremely agreeable and 1 meaning extremely disagreeable. In contained 25 items covering five main issues : advantages of breastfeeding to babies; advantages of breastfeeding to mother; knowledge about practice for breastfeeding initiation; knowledge about breast milk feeding requirement; and knowledge on breast milk storage and use. For example,