From the perspective of deontology, celebrity spokespersons should consider whether the functions and characteristics of products are beneficial to the advertising target group, rather than purely for profit.

From the utilitarian point of view, celebrity spokespersons should ensure that the products they endorse will not harm the material and life health of consumers who use the products, and that the products they endorse can meet the needs of consumers and benefit them;

According to the outstanding obligation theory of the concrete judgment theory of marketing ethics, celebrity spokespersons should undertake six outstanding obligations: honesty, gratitude, fairness, kindness, self-improvement and non-evil.

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Are you used to write papers? It happens that my thesis is also about marketing ethics and food enterprises, so I have a little contact with marketing ethics for reference only.