C69 It Was Ancient Silk Road

After Jianjun Cheng explained the standard prototype of the power train, Zhao Cheng finally couldn't help but say to Zhang Hong: "Old Zhang, have you thought about building the railway on the ancient Silk Road?"

"Not before, but now I do. " Zhang Hong smiled very brightly, "I finally understand why the 200 and 300 lines of the New Line specialize in ice-breaking trains and anti-freeze trains