Chinese scientists have made improvements for the porthole of the Shenzhou-23 spaceship at the launch site to avoid potential emergency situations caused by space debris.
The Shenzhou-20 spaceship's return capsule viewport window suffered a suspected impact from space debris during its mission last year. The three Shenzhou-20 astronauts returned safely aboard the Shenzhou-21 spaceship on Nov. 14, 2025, and later on Nov. 25, China launched the Shenzhou-22 spaceship to provide a return vessel for the three Shenzhou-21 astronauts, who are currently in orbit.
To avoid such a potential emergency during the Shenzhou-23 mission, the porthole improvements were implemented ahead of schedule.
According to the original plan, the porthole upgrade was scheduled for implementation on the Shenzhou-24 spacecraft. However, after the Shenzhou-20 experienced an in-orbit space debris impact that affected the astronauts’ return, the team conducted a comprehensive assessment and decided to advance the upgrade to Shenzhou-23 to ensure a smooth and safe mission.
"The previous version of the viewport window had one layer of anti-ablation glass, while we increased that to two layers for the new window for dual redundancy. In addition, we have taken an extra protective measure as a final safeguard inside the capsule. These make up a three-layer anti-ablation function, adding an extra insurance for the astronauts to work and live safely and securely in orbit, and to return safely," said He Yu, chief commander of Shenzhou spacecraft of the China Aerospace Science and Technology Corporation.
Under normal circumstances, the viewport windows are installed at the spacecraft assembly workshop in Beijing before the capsule is assembled with other ones. But, since the Shenzhou-23 had already been manufactured and placed on emergency standby at the Jiuquan Satellite Launch Center, the porthole upgrade was conducted after all three modules had already been assembled -- a process much more difficult due to the confined space inside the capsule.
"Our guiding principle is putting people first. Moreover, we must further demonstrate the strength of China as a major country with strong aerospace capabilities. We will never allow space debris to affect the smooth progress of our mission," said the chief commander.
Shenzhou-23 spaceship undergoes porthole improvements at launch site
The 140th edition of the China Import and Export Fair, also known as the Canton Fair, entered its third day on Saturday, with a wave of AI-powered products making their debuts and injecting fresh momentum into China's export growth.
The event opened to visitors in Guangzhou, capital of south China's Guangdong Province on Thursday, and will be held in three phases through Nov 4.
The latest edition of the fair is showcasing 235,000 AI products, while more than 20,000 exhibitors have adopted different kinds of new technologies. Booths featuring the latest AI products have been drawing crowds, with visitors waiting in long queues to try out the exhibits.
"[The Canton Fair] really gets more popular every year. By around 9:30, people were already queuing in two lines. Some buyers did not want to wait to try the products, so they just bought them on the spot," said exhibitor Liang Linchao.
"The enthusiasm of Canton Fair [buyers] has exceeded my expectations. About one-third of customers want to take one home immediately after the fair ends. That gives us great confidence to explore and expand our overseas markets," said another exhibitor Cui Wei.
Beyond creating business opportunities, products showcased at the Canton Fair can also make a difference in the lives of people in need.
Max Young, who was visiting the Canton Fair for the third time, brought his mother along this time. The mother and son had expected to simply soak up the bustling atmosphere, but an exoskeleton robotic device they came across brought them an unexpected surprise.
His mother, who has had difficulty walking since suffering a stroke, was able to stand up and walk with the help of the device.
"It just keeps my legs going. It's good. Yes, it's good," said his mother, Suzanne Elliott, almost bursting into tears.
"Last year she had a stroke, so the left-hand side of her body is a little bit weaker. About one year ago she couldn't walk or stand up at all. We tried this one today. It seems very good. I think it would help her to get better," said Young.
At the 140th Canton Fair, many exhibitors are accelerating the rollout of research achievements into real application scenarios, turning technological strengths into market advantages and making the fair a major showcase for technological innovation.
"Extremely impressive. Just everything about the efficiency and just how vast and large everything is. We saw a lot of production now is gone to robotics production, AI technology, less humans, really advanced and precise, a lot of precision manufacturing. I think innovation is starting here now. I think now the initiation is here, the R and D is here, and the creativity is coming from China. Very, very impressed," said Canadian buyer Yehuda Klein.
Serving as a barometer and wind vane of China's foreign trade, this year's fair, marking its 70th anniversary, features innovation, intelligence, greater specialization and higher quality.
The Canton Fair is one of the world's few one-stop trade platforms offering a complete range of products with convenience and efficiency, while bringing together the latest products and technologies.
AI products take center stage at 140th Canton Fair, showcasing innovation, offering real-world benefits
AI products take center stage at 140th Canton Fair, showcasing innovation, offering real-world benefits
