'Yifu' is used to describe traditional Chinese medicine, such as' Yifu Decoction '. 'a pair' is used to describe things in pairs, such as' a pair of couplets', 'a pair of gloves',' a pair of earrings', etc.
'a pair' is a quantifier, which is usually used to describe something in pairs. For example, when it is used to describe a complete set of things, it can be said to be 'a pair of chess', and when it is used to describe things in pairs, it can be said to be' a pair of gloves', 'a pair of earrings' and so on.
Although 'Yifu' is also one of the quantifiers, it can only be used to describe fixed things. Like 'taking', it can write quantifiers that refer to traditional Chinese medicine, such as' one dose of soup medicine 'and' one dose of soup medicine '.
The confusion between "Fu" and "Fu" mainly originated from the implementation of the second Chinese character simplification scheme, because in this simplification scheme, "Fu" became a simplified word of "Fu" and "Fu".