Legal analysis: If a foot bath shop commits a crime involving pornography, the criteria for the public security to identify pornographic transactions are: the perpetrator has subjectively reached an agreement on prostitution and whoring, negotiated the price or paid money and property, and has begun to implement it. Prostitution and whoring shall be detained for more than 18 days and less than 15 days, and a fine of less than 5,000 yuan may be imposed; If the circumstances are minor, they shall be detained for less than 5 days or fined for less than 500 yuan. Whoever solicits prostitutes in public places shall be detained for not more than five days or fined not more than 500 yuan.

Legal basis: Article 66 of the Law of People's Republic of China (PRC) on Public Security Administration Punishment stipulates that those who engage in prostitution or whoring shall be detained for more than 10 days and less than 15 days, and may also be fined less than 5,000 yuan; If the circumstances are minor, they shall be detained for not more than five days or fined not more than five hundred yuan. Whoever solicits prostitutes in public places shall be detained for not more than five days or fined not more than 500 yuan.