The clothes are dark blue, and the words "China Railway Construction" and "China Railway 14th Bureau Group" are printed on the front and back respectively. Relevant information of China Railway 14th Bureau shows that the work clothes of China Railway 14th Bureau are dark blue, and the words "China Railway Construction" and "China Railway 14th Bureau Group" are printed on the chest and back respectively. China Railway 14th Bureau Group Co., Ltd. is a large construction enterprise managed by the State Council State-owned Assets Supervision and Administration Commission. It is also the backbone and leading enterprise in the fields of large-diameter shield, underwater shield tunnel and urban rail transit in China.