During on 13TH December 2025 at 1700 Hong Kong SAR- Beijing Time launching from one of many complexes酒泉衛星發射中心 Jiuquan Satellite Launch Center in Dongfeng Aerospace City – inner Mongolia –China – People’s Republic of China on中國製造Expace Technology Corporation, , the Kuaizhou-11 Y8 solid carrier rocket ignited and lifted off at the Jiuquan Satellite Launch Center deploying the sending the successfully sending the Dier-5 space experiment spacecraft and the Hope-5 Phase II satellite into their predetermined orbits. The launch mission was a success. The Kuaizhou -11 rocket, developed by China Aerospace Science and Industry Corporation Rocket Technology Co., Ltd., has a payload capacity of 1 ton to a 700-kilometer sun-synchronous orbit. With a fairing diameter of 2.65 meters, it features high flight reliability, high orbital accuracy, short preparation time, minimal support requirements, and low launch cost, making it suitable for diverse commercial launch missions.
Kuaizhou-11 Y8 carrier rocket was launched from the Jiuquan Satellite Launch Center, successfully sending the Dier-5 Space Experiment Vehicle and the Hope-5 Phase II satellite into orbit. The flight test mission was a success. Dier-5 is a small cargo spacecraft independently developed by Ziwei Technology, consisting of a service module and a payload module. Its cargo capacity exceeds 300 kg, and its cargo space is 1.8 m³. This launch carried 34 experimental payloads (sets/units) from research institutes, universities, and enterprises, which will conduct on-orbit scientific research and technology verification in multiple cutting-edge fields such as microgravity science, space life science, space materials science, aerospace medicine, and verification of new space technologies for one year .
[A Brief Introduction to the Dier-5 Space Experiment Vehicle]
The Dier-5·China Science and Technology City spacecraft was launched into a near-Earth circular orbit at an altitude of 530km and will operate at a long-term altitude of 343km with an inclination of 41.5°. This launch carried 34 experimental payloads (sets/units) from research institutes, universities, and enterprises, which will be used to conduct scientific research and technology verification in multiple cutting-edge fields, including microgravity science, space life science, space materials science, aerospace medicine, and verification of new space technologies, for a period of one year.
The Dier-5 is a small cargo spacecraft (B300-L) independently developed by Ziwei Technology, designed for on-orbit deployment. It consists of a service module and a payload module, with a cargo capacity exceeding 300 kg and a cargo space of 1.8 m³. Equipped with an intelligent cargo management system, it can manage over 100 payloads in orbit. It supports rapid integration and testing of various complex payloads, meeting the power supply, communication, temperature control, and environmental measurement needs of different payloads. It can perform on-orbit control, status monitoring, on-orbit operation management, business data acquisition, storage, downlink, and reception, and its zoned temperature control system ensures that payloads complete experimental objectives within the designed temperature range. Furthermore, the “Dier-5·China Science and Technology City” meets the requirements for a long-term 600W and peak 1000W power supply and supports a downlink rate of 300Mbps. In addition to providing customized payload services for clients, this mission also carries multiple mini space laboratories (MSLs), which can be used for professional-grade scientific experiments as well as on-orbit science popularization activities .
This mission marked the fourth flight of the Kuaizhou-11 rocket and the 37th flight of the Kuaizhou series of carrier rockets.
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