Is China Railway Ninth Bureau and China Railway Science and Industry Group the same level?

No.9 Railway Bridge and China Railway Science and Industry Group are two subsidiaries of China Railway (China Railway Engineering Corporation) with different levels. China Railway No.9 Bridge Co., Ltd. is a secondary subsidiary of China Railway Group, focusing on bridge engineering; China Railway Science and Industry Group Co., Ltd. is a subsidiary of China Railway, which is engaged in the construction and design of railways, highways, urban rail transit and its engineering fields.