Theory on legislation on personal data protection against the background of big data 并列题名：Theory on legislation on personal data protection against the background of big data Research of legislation of personal data protection in mainland China 并列题名：Research of legislation of personal data protection in mainland China Research on the construction of personal information protection system in the era of big data Measurement and regulation of internet financial risk in the background of big data Privacy regulatory of personal data on the context of big data Solution of logistics innovation development under the background of big data