Now let‘s zoom in on the troubleshooting APP. Please allow me to give you an in-depth introduction of the APP for One-stop smart troubleshooting:the APP can interact with back-end systems in real time through firewall and ESB platform, including IPRAN Intelligent fault analysis system mentioned in the previous page.It mainly implements the real-time alarm receiving, handling and timely feedback of faults. And By compressing the push of alarm, it reduces the number of failure worksheets and visits greatly. It also reduces the operation and maintenance costs as better as possible.So we can say it helps the front-line maintainers solve the Last Mile problem of(by) efficient operation and maintenance.In addition, in line with the goal of being safe, efficient, friendly, convenient and intelligent, the APP also provides a unified portal and integrates intelligent operations and maintenance solutions, including one-click to analyze the fault , AI diagnostic robots etc.Other functions are arranged and packaged through ESB to put it(them) into the APP, which is(are) helpful to improve the skills of front-line operation and maintenance, and useful to improve online operation efficiency and improve customer satisfaction.