Solicitation is a kind of agreement involving such questions as the validity of the contract, the attribution of fees and the culpa in contrahendo. Considering the lack of civil provisions concerned with this problem, the regulation should be adopted through civil judgment and thus the base of the society governed by rule of law can be strengthened. Solicitation can be classified into different categories including solicitation of official positions, school admission solicitation, solicitation of influencing judicial judgment or administrative procedures, solicitation of qualification, solicitation about assuming other's name, solicitation of taking advantage of media relations to influence the judicial or administrative procedures, solicitation of debt collection via violence, and solicitation of examination impostor. The solicitation should be defined as commission in civil law. The validity of solicitation which can violate the mandatory provisions or pubic order and fine custom should be determined according to the article 54 subparagraph 4 or 5 of the contract law and the article 153 of the General Provisions of the Civil Law of the People's Republic of China. Three models including return, not-return in case of illegal payment and seizure can be applied to the attribution of fees on the base of the validity of the contract and the evaluation of the particular characteristics of specific cases.