CRH1A-A EMU train is a new generation of high-speed emu train redesigned by bombardier using ZEFIRO250 platform and produced by Qingdao Sifang Bombardier (BST). It adopts 8-train design of 5M3T and has A seating capacity of 613. The CRH1A-A EMU train optimized the head design on the basis of the prototype and changed the original stainless steel body to aluminum alloy body, which improved the air tightness of the body, optimized the bogie suspension, and improved the stability and comfort of the train.It should be noted that CRH1A-A EMU trains are completely different from CRH1A EMU trains introduced in August 2004 during the sixth speed increase of China Railway.