Recently, Alibaba has released the technical report for Qwen 2 with great fanfare. This report provides a detailed introduction to the model architecture of the Qwen 2 series. It delves into the unique structural design and the functions of each component, allowing people to clearly understand the intricacies of the model architecture. The report also outlines the general training process, including the training data used, the training methods, and the challenges encountered and solutions found during the training process. In addition, the report presents the test results of the Qwen 2 series models. Through a series of rigorous testing metrics and validation in practical application scenarios, it fully demonstrates the outstanding performance, accuracy, and stability of the series of models in various aspects.