The main technical content is in "Technical Requirements, Inspection Methods, Inspection Rules". Some of the items in "Technical Requirements" refer to European Pharmacopoeia 9.3,07/2017:2798. However, considering that there are many items in the EP standard that are not suitable for domestic The actual situation and the quality requirements of lutetium trichloride [177Lu] required by this standard are limited, so the EP standard is only used as a reference. The determination of the main technical content is mainly based on the actual domestic situation described in the "Preparation Principles" and the verification of quality inspection methodology. The corresponding "inspection methods" are mainly based on the relevant chapters of the "Pharmacopoeia of the People's Republic of China 2020 Edition" . and verified.