Shenzhou-23 Crew Completes Three Weeks on Tiangong Space Station
The Shenzhou-23 crew has completed three weeks of work and life aboard China’s Tiangong space station as of June 15, 2026, according to Xinhua News. The mission, launched on May 24 from the Jiuquan Satellite Launch Center, is the seventh crewed mission of the space station’s application and development phase and the 40th flight of China’s crewed space program.
Commander Zhu Yangzhu, pilot Zhang Zhiyuan, and payload specialist Li Jiaying have been conducting scientific experiments and maintaining orbital operations since docking with the Tianhe core module via autonomous fast rendezvous. The crew formed a three-ship, three-cabin configuration upon arrival.
A Historic Crew
The Shenzhou-23 crew represents several firsts for China’s human spaceflight program. Commander Zhu Yangzhu, who previously flew on Shenzhou-16 in 2023, is the first aerospace flight engineer to serve as mission commander and the first third-batch astronaut in that role, as reported by QQ News.
Zhang Zhiyuan, a third-batch astronaut and former PLA Air Force pilot, is making his first spaceflight as spacecraft pilot.
Most notably, Li Jiaying — a 44-year-old former Hong Kong Police Force superintendent with a PhD in Computer Forensics from the University of Hong Kong — has become the first Hong Kong citizen to enter space. Selected in 2022 for China’s fourth batch of astronauts and formally joining in August 2024, she is also the first female payload specialist from Hong Kong or Macau. According to BBC Chinese, she completed over 200 training subjects totaling more than 1,700 hours before passing her flight qualification with excellence.
Scientific Mission and the One-Year Stay Experiment
A defining feature of the Shenzhou-23 mission is that one crew member will conduct a one-year in-orbit stay experiment — China’s first space human research program. CMSA spokesperson Zhang Jingbo stated at a pre-launch press conference that this is “by no means a simple accumulation of two half-year missions,” as reported by IT Home.
The crew is tasked with over 100 scientific and application projects spanning space life sciences, materials science, microgravity fluid physics, space medicine, and space technology. Key experiments include zebrafish and mouse embryo research, stem cell-derived “artificial embryo” studies, and the in-orbit verification of new space energy storage batteries.
In space medicine, the mission will explore long-duration flight human adaptation characteristics and capability boundaries, aiming to produce a multi-system, multi-omics space human atlas for extended missions.
Hong Kong’s Scientific Contribution
Li Jiaying’s role includes operating the Tianyun camera, a lightweight, high-resolution CO₂ and methane detection instrument developed by a Hong Kong University of Science and Technology team. Mounted on the Tiangong space station, the camera captures 50-by-50-kilometer images from 400 kilometers altitude and can pinpoint individual factory smokestacks just 100 meters apart, supporting China’s carbon peak and carbon neutrality goals.
Hong Kong Chief Executive John Lee framed Li’s spaceflight as “the most vivid portrayal of the superiority of ‘one country, two systems,’” according to BBC Chinese. Lee emphasized that without Hong Kong’s return to China in 1997, “even if Britain had space capabilities, there would never be a Hong Kong person’s share.”
Predecessor Mission Legacy
The Shenzhou-23 crew conducted a handover with the Shenzhou-21 crew, who departed after a record-setting 203 days in orbit. The predecessor mission achieved several milestones, including China’s first in-orbit mouse breeding, low-defect indium selenide crystal growth, cherry tomato and wheat aeroponic cultivation, and novel ionic liquid propellant in-orbit ignition.
What to Watch For
CMSA has not yet announced which crew member will undertake the one-year stay, stating the decision will be based on in-orbit conditions. Future milestones include scheduled extravehicular activities, cargo transfers, and the installation of space debris protection devices and external payloads. The mission continues to demonstrate China’s expanding human spaceflight capabilities and deepening integration of Hong Kong’s scientific community into national space endeavors.