This aerial photo taken on Jan. 4, 2023 shows bullets trains at a garage of CRRC Qingdao Sifang Co., Ltd. in Qingdao, east China's Shandong Province. As a major manufacturer of high-speed trains in China, CRRC Qingdao Sifang Co., Ltd. overhauled the trains that will serve the upcoming Spring Festival travel rush to ensure their smooth operation. (Xinhua/Li Ziheng)
