C120 China Has Been Reteaching and Learning for a Long Time

Three years later, Jianjun Cheng and Jianguo Su took their teams to complete the braking plan and reported it to Shanghai's railway department.

Zhang Hong tightly gripped the plan for the brake and looked at Zhao Cheng with red eyes, "Elder Zhao. . . Look. . . "

"En, I see, the children are quite powerful. " Zhao Cheng smiles as he nods his head, "I did not expect that from this year onwards