In the era of digitizing everything and making everything count, how can digital prosecution deeply integrate with criminal prosecution work, promote supervision and case handling to improve quality and efficiency, and promote the implementation of "high-quality and efficient handling of every case"? On the afternoon of March 15th, Miao Shengming, a deputy ministerial level full-time member of the Procuratorate Committee of the Supreme People's Procuratorate and Director of the First Procuratorate, led a team to conduct research in the procuratorial organs of Beijing. This three and a half hour survey may provide a practical reference for answering the above questions. Zhu Yabin, Secretary of the Party Group and Chief Prosecutor of the Beijing Procuratorate, was also surveyed together. If digital prosecution is compared to a big tree, the application model of legal supervision is the "fruit" of digital prosecution. At the beginning of the research, frontline prosecutors from grassroots procuratorial organs in Beijing demonstrated and reported on the five big data legal supervision models they had developed and applied one by one. In response to the problem of some medical insurance insured individuals illegally profiting, reselling their medication after prescribing, and reselling it to another location after receiving medication at a higher price, the medical insurance funds have been "eroded". The Miyun District Procuratorate of Beijing and the Shijingshan District Procuratorate of Beijing have jointly developed a medical insurance fraud identification and supervision model. "By analyzing and identifying the electronic data and other information of suspect using mobile phones in medical insurance fraud cases, we identified and determined the drug collection group and key drug collection personnel clues, and transferred 507 key involved persons to the public security organs," said the reporter of the model. "What is the success rate for the 507 key personnel involved in the transfer?" Miao Shengming asked. "At present, the public security organs have completed the first batch of 127 transferred individuals' relevant clues verification work, and 111 individuals have been confirmed to have taken criminal detention measures." The reporter replied. In the normalization of anti gang and anti evil work, the field of engineering construction is one of the four major industry areas for special rectification. When the Beijing Procuratorate's Anti Corruption Office sorted out relevant cases, it was found that illegal crimes such as malicious bidding and forced engineering were not occasional, and it is necessary to use big data for clue analysis and judgment. In this survey, the investigation and judgment model of black and evil clues related to extortion of construction fees in the engineering and construction industry reported by the Daxing District Procuratorate in Beijing is refreshing. "How to convert these criminal clues into criminal cases with high quality?" Miao Shengming asked. "Mainly through the supervision mechanism of 'city level judgment and grassroots handling', the reporter explained.". "In the process of applying digital models to business case handling, attention should be paid to combining them with the special actions of 'procuratorial and enterprise protection' and 'procuratorial and people's livelihood protection'," Miao Shengming advised. The procuratorates of Fangshan District, Miyun District, and Haidian District in Beijing also provided detailed reports on the big data supervision and governance model for fraudulently obtaining pesticide subsidies, the big data legal supervision model for the penetration of gambling crime prosecution funds, and the big data legal supervision model for misdemeanor governance. After the presentation, Miao Shengming and his delegation had discussions and exchanges with relevant officials from the Beijing Municipal Procuratorate and grassroots institutions. "In the practice of digital prosecution, frontline prosecutors innovate their performance methods through data association, promote the transformation of case handling to similar case supervision, establish deep logic through research, refine business rules, construct application data models, promote supervision of case handling from shallow to deep, from case to governance, and continuously integrate into the governance system of the capital city under the rule of law." Zhu Yabin introduced. Reporter