3. There must be a detailed advice on cleansing and preparing to make sure hygiene, food items safety and good nutrition suited to health disorders of the people.B?n ph?i ??ng nh?p ho?c ??ng ký Thành Viên TVPL Pro ?? s? d?ng ???c ??y ?? các ti?n ích gia t?ng liên quan ??n n?i dung TCVN.B?n ph?i ??ng nh?p ho?c ??ng ký Thành Viên TVPL Profes