“…Thanks to the development of smart grid, IoTs applied in power industry can help operators to monitor and gain fine-grained data. Thus portrait techniques were gradually introduced to power industry, especially in the areas including outlier detection (Tang et al, 2014), equipment ledger management (Li et al, 2020), business management for commercial Internet platform of stateowned corporation (Yu et al, 2019), transmission line management (Zhang, 2019), electricity enterprise supplier management (Huang et al, 2021), user management (Shi et al, 2016;Wang et al, 2017;Feng et al, 2018;Lu et al, 2018;Zhong et al, 2018;ShiLu and Tian, 2020;Hu et al, 2021;Kong et al, 2021;Li et al, 2021;Yan et al, 2021). Users' tariff recovery risk, credit rating and energy efficiency rating was assessed with power consumption, payment and arrears data in (Shi et al, 2016;Wang et al, 2017;Yan et al, 2021) respectively.…”