No. 74 Machang Road, Heping District, Tianjin was once the former headquarters of Bohai Iron and Steel Group. Once a "steel giant", but due to various issues such as lax corporate governance, production and operation have fallen into difficulties, which has also affected its subsidiary, ZTE Shengda Co., Ltd. Many employees choose to leave with disappointment, including Li Baojun, who has been working in the company for ten years.