Is the 704 Institute of Aerospace No.9 Institute and Aerospace Long March Rocket Co., Ltd. a unit?

No, No.704 Aerospace No.9 Institute and Aerospace Long March Rocket Co., Ltd. are not the same unit. They are two subsidiaries of China Aerospace Science and Technology Corporation. There are 704 Aerospace Nine Institutes, which are called the 704th Institute of China Aerospace Science and Industry Group. They are one of the wholly-owned subsidiaries of China Aerospace Science and Technology Group Co., Ltd. (hereinafter referred to as AVIC), mainly engaged in research and development of space technology, missile and control technology, information processing technology and so on.