What is the background of the registration photo of Huaiyin Public Security Auxiliary Police?

Blue. According to the recruitment announcement issued by Huai 'an Public Security Bureau, the registration photo of Huaiyin Public Security Auxiliary Police has a blue background. Auxiliary police, as its name implies, are the staff who assist the formal police work. Funded by the government, after written examination, interview, political examination and physical examination, they are employed by the public security organs and establish labor relations with them. Under the command and supervision of public security organs and their people's police, they are engaged in police auxiliary work.