China’s Chang’e-7 Nears Launch After Vertical Transfer

China’s Chang’e-7 lunar exploration mission has reached its final pre-launch milestone. The rocket-spacecraft assembly completed its vertical transfer to the launch pad at the Wenchang Space Launch Site in Hainan Province on the morning of August 19, according to Xinhua News Agency. The mission is scheduled to launch in the coming days, targeting the Moon’s south pole for a historic first landing in November.

The Chang’e-7 probe and its Long March 5 Y-14 carrier rocket arrived at the launch site in April and July respectively, completing assembly and testing in the technical area before the vertical transfer. The China Manned Space Agency (CMSA) confirmed that launch pad facilities are in good condition, with final checks, joint tests, and propellant loading scheduled before liftoff.

A Mission to the Moon’s Most Extreme Frontier

Chang’e-7 represents China’s most ambitious lunar expedition to date, designed to land at the lunar south pole near Shackleton Crater at approximately 88.8°S 123.4°E. This will mark the first-ever touchdown at the Moon’s south pole, a region of extreme temperatures and permanently shadowed craters that may hold water ice preserved for billions of years.

The mission consists of four primary elements: an orbiter, a lander, a rover, and a small flying probe known as a “hopper.” With a total launch mass of approximately 8,200 kilograms, the spacecraft carries 21 scientific payloads, including six international instruments from seven countries and organizations.

According to the China National Radio, mission deputy chief designer Tang Yuhua emphasized the significance of the south pole landing: “Because we landed on the near side with Chang’e-3 and Chang’e-5, then Chang’e-4 and Chang’e-6 landed on the far side, now we’re landing at the south pole — it’s equivalent to having the capability to reach anywhere on the Moon.”

The Hunt for Water Ice

A primary scientific objective of Chang’e-7 is the search for water ice in permanently shadowed craters at the lunar south pole. The mission’s novel hopper will leap into these dark craters, carrying a LUnar soil Water molecule Analyzer (LUWA) to directly sample for water ice — a world first in robotic lunar exploration.

Ye Peijian, an academician of the Chinese Academy of Sciences, told China Central Television that “scientists worldwide suspect water on the Moon, but no one has confirmed it yet. China will now search, using methods that span surface measurements to crater interior exploration,” as reported by BioScience.

The mission’s significance extends beyond China’s borders. Norbert Schörghofer, a senior scientist at the Planetary Science Institute in Honolulu, told Starlust that “Chang’e 7 is destined to find water ice and make the first in-situ measurements of water ice on the Moon.” He added that “the Chinese will be ahead of everyone else by at least one year, but probably several years.”

Key Technologies and Engineering Challenges

The mission aims to break through several key technologies, including high-precision soft landing on the lunar surface, legged walking, lunar surface hopping, and exploration of permanently shadowed craters. The landing precision is critical — Tang Yuhua noted that “the landing precision is high enough to land exactly on flat areas. It can autonomously judge the terrain — half of the actions are autonomous, without ground intervention.”

The extreme environment at the lunar south pole poses significant challenges. Wu Weiren, chief designer of China’s Lunar Exploration Program, explained: “We are the first humans to land at the lunar south pole, and we need to work there for a long time. The temperature environment is very harsh. The lunar south pole can have continuous sunlight for about 100 days, but temperatures drop to over 100 degrees below zero Celsius.”

The Long March 5 Y-14 rocket, China’s most powerful operational launch vehicle, uses the “three vertical” launch mode — vertical assembly, vertical testing, and vertical transfer. The rocket arrived at Wenchang via sea transport on July 13, as People’s Daily reported, following the probe’s arrival in April via AN-124 transport aircraft and road transport.

International Cooperation

The mission carries six international payloads from Egypt, Bahrain, Italy, Russia, Switzerland, Thailand, and the International Lunar Observatory Association (ILOA). These include a laser corner reflector array from Italy for high-precision lunar surface measurements, a lunar dust and electric field detector from Russia, and a lunar-based astronomical telescope from ILOA.

Steve Durst, ILOA’s founding director, said the telescope “aims to capture stunning images of the galactic plane, contributing to lunar science and inspiring future generations.” The payload selection was announced in April 2024, as Huaxi Dushi Bao reported at the time.

The mission is operated by the China Manned Space Agency, having transitioned from the China National Space Administration in 2026. Communications support will be provided by the Queqiao-2 relay satellite, launched in March 2024.

Strategic Implications and the Road Ahead

Chang’e-7 is a critical precursor for China’s planned crewed lunar landing by 2030 and the establishment of the International Lunar Research Station (ILRS) by 2035. The mission will directly inform site selection for future lunar infrastructure and demonstrate China’s capability for high-precision landing in challenging terrain.

Wu Weiren expressed hope that “on the basis of phase four of our lunar exploration program, there will be a large international scientific-technological research project initiated by China, with the participation of multiple countries.”

The mission also places China in direct competition with NASA’s Artemis program for lunar south pole exploration. Chang’e-7 is expected to land before Artemis III’s crewed mission, potentially giving China the first human-made presence at the lunar south pole.

The orbiter, lander, and rover have a design life of eight years, while the hopper is designed for six months of operation. After landing in November, the mission will conduct comprehensive surveys of the lunar south polar environment, search for water ice, and lay the groundwork for future human exploration of the Moon.

As the rocket and spacecraft stand ready at the launch pad, the coming days will determine whether China can successfully execute what mission designers describe as its most technically demanding lunar expedition yet. The launch window opens around August 24, with lunar orbit insertion planned for August 29 and the south pole landing targeted for November.