It is learned that Spreadtrum Communication (Tianjin) Co., Ltd, a wholly-owned subsidiary of Zhanrui Technology Co., Ltd, is recognized as "a leading enterprise integrated circuit industry of Tianjin". Zhanrui (Tianjin) Company has won the titles of National New High-Tech Enterprise, National Integrated Circuit Design Enterprise and Tianjin Enterprise Technology Center. The company attaches importance to talent training, with R&D personnel accounting for more than 95%. It takes intellectual property as the foundation of the enterprise, regards "multi-dimensional, multi-means, high yield and obvious effect" as the working concept of intellectual property, and has more than 200 patent applications. Among them, invention patents account for more than 90%. It won the gold award of Tianjin Patent Award in 2020. The patent name of Zhanrui (Tianjin) company, which won the 22nd China Patent Excellence Award, is "mobile terminal and its network selection method". The technical scheme of the invention can solve the problem of fast network selection of multi-mode mobile terminal supporting multiple duplex modes, greatly improve the efficiency and accuracy of network selection of mobile terminal, saving resources and reducing power consumption.