Jianyan Hanggui Gong Bei (Beijing) Engineering Consulting Co., Ltd. is the original drawing review unit.

China International Engineering Consulting and Municipal Engineering Design and Research Institute. Jianyan Hanggui Beijing Engineering Consulting Co., Ltd. was initially audited by two drawing review units, namely China Consulting International Engineering Unit and Municipal Engineering Design and Research Unit. The drawing review unit is a third-party unit with design review qualification, and the engineering construction drawing must be submitted to the construction drawing review station of a qualified third-party independent unit after the design is completed.