CITIC Telecom CPC data science and innovation professionals won the First Runner-up award at the 3rd Alibaba Cloud AIOPS Competition. With “Root cause diagnosis” as the topic, the Competition focused on troubleshooting large-scale server outages, which might lead to big losses to customers. Participating teams need to analyze key logs to investigate the root cause and solve the problem during the 3-month contest. In-depth understanding of the competition topic and technologies, innovative thinking and professional algorithm capabilities have made our data science and innovation team stand out from 1,758 teams from 21 countries and regions. The expert jury panel gave the team high acclaim and recognition based on algorithmic level of analysis, innovation ability and onsite incident response capability.