Simply put, Claims 4 and 5 here have the problem of being cited many times. Repeated quotation will lead to the complexity or confusion of the technical scheme contained in the claim, thus leading to the confusion of rights. It should be understandable if you think about it yourself. The censor will be angry with you for tossing out several statements, hehe.
Eliminate this problem, as long as there are no multiple citations, how many or all can be used.