The Long March 10 and the SLS are both designed to carry crews back to the Moon, but they reach a similar trans-lunar payload in very different ways. Each is rated to send roughly 27 metric tons toward the Moon. NASA’s rocket can lift far more to low Earth orbit and has already flown. China’s rocket lifts less, costs less to build, and has yet to reach orbit.
The real difference isn’t thrust. It’s how the two space programs approached the same challenge: one chose hydrogen and heritage hardware, while the other chose kerosene and a repeated core.
The Comparison at a Glance
| Measure | Long March 10 | SLS Block 1 |
|---|---|---|
| Builder | China Academy of Launch Vehicle Technology | NASA with Boeing and Northrop Grumman |
| First orbital flight | Not yet flown | Flown |
| Height | About 92.5 meters | About 98 meters |
| Liftoff mass | About 2,189 metric tons | About 2,600 metric tons |
| Liftoff thrust | Roughly 26,000 kilonewtons | Roughly 39,000 kilonewtons |
| First-stage propellant | Kerosene and liquid oxygen | Liquid hydrogen and liquid oxygen, plus solid boosters |
| Engines at liftoff | 21 YF-100K | Four RS-25 plus two solid rocket boosters |
| Payload to low Earth orbit | 70 metric tons | About 95 metric tons |
| Payload toward the Moon | 27 metric tons | About 27 metric tons |
| Launches per crewed landing | Two | One for crew, plus separate lander flights |
| Reusable hardware | None on the crewed version | None |
| Published cost per flight | Not published | Estimated around $4 billion |
Flight History Is the Widest Gap
The SLS has launched and the Long March 10 has not. That single fact outweighs every performance line in the table. A rocket that has flown has already retired the risks a rocket on a test stand still carries.
China’s vehicle completed a low-altitude demonstration flight at Wenchang on 11 February 2026, following tethered ignition tests of its seven-engine core. The related Long March 10B flew and recovered a first stage at sea on 10 July 2026. Neither event is an orbital flight of the three-core crewed configuration.
The American rocket has the opposite profile. It works, and the argument against it is what each flight costs rather than whether it will fly.
Hydrogen Versus Kerosene Explains the Payload Split
The SLS carries 25 more metric tons to low Earth orbit but no more toward the Moon, and the propellant choice is why. Liquid hydrogen delivers more energy per kilogram than kerosene, which pays off most in upper stages doing the long burns that leave Earth orbit. Hydrogen is also bulky and cold, so tanks are larger and the plumbing is harder.
The Long March 10 burns kerosene in all 21 of its first-stage engines and switches to hydrogen only in the third stage, where three YF-75E engines perform the push toward the Moon. That layout gives it a smaller, denser rocket that lifts less overall, then recovers ground on the part of the flight that matters for a lunar mission.
The SLS spends its hydrogen advantage differently. Solid boosters supply most of the thrust off the pad, and four RS-25 engines carry the core stage the rest of the way. The result is high raw lift with an expensive engine set thrown away every time.
Two Launches, or One Plus a Lander
The rockets are sized around different mission plans, and comparing them without that context misreads both.
China’s plan is a two-launch lunar orbit rendezvous. One Long March 10 carries the Mengzhou crew spacecraft. A second carries the Lanyue lander. They meet in lunar orbit, the crew transfers, two astronauts descend, and the lander returns them to Mengzhou for the trip home. Neither launch has to carry the other’s mass, which is how a 27-metric-ton trans-lunar payload is enough.
Artemis puts crew on the SLS in the Orion capsule and buys the landing separately. A version of Starship serves as the lander, and it requires its own launches plus orbital refueling before it can meet Orion. Counting flights, the American plan needs more launches per landing than the Chinese one, though most of them are commercial and reusable.
Carrying People Is a Separate Qualification
A rocket that lifts 70 metric tons is not automatically allowed to carry a crew. Human rating adds abort capability, tighter structural margins, and a failure analysis that has to show the crew survives the plausible ways the vehicle breaks.
Both programs have done visible work here. China ran a zero-altitude abort test of the Mengzhou spacecraft, firing the escape system to pull the capsule clear of a rocket sitting on the pad. NASA carried the same requirement into Orion, whose launch abort system was tested before Artemis flew.
The difference is flight evidence. Orion has flown on the SLS. Mengzhou has not flown on the Long March 10. Ground tests show a system works in the conditions engineers can reproduce. A flight shows it in the ones they cannot.
Only One of These Rockets Has a Published Cost
NASA’s Office of Inspector General has estimated Artemis flights on the order of billions of dollars each, with about $4 billion per launch the number most often quoted. That figure is the core of the criticism the SLS attracts.
China has published nothing equivalent for the Long March 10. Chinese launch pricing runs through state channels, and a crewed national program is not sold on a commercial rate card. Assuming the Chinese rocket is cheaper because Chinese labor and materials cost less is a guess. Lower Chinese wages and material costs make it plausible, and no published figure confirms it.
What can be compared is production logic. The Long March 10 flies three copies of one 5-meter core per launch, feeding a single production line. The SLS uses a purpose-built core stage plus solid boosters and RS-25 engines produced in small numbers by long-standing suppliers, which is precisely the structure that makes each unit expensive. Commercial launch prices for other Chinese rockets are covered on the Chinese rocket launch cost page.
What Each Rocket Launches Besides a Moon Mission
The SLS has one customer and one job. It exists to send Orion toward the Moon under Artemis, and no other payload is manifested on it. That single-purpose design is part of why the per-flight cost stays high: there is no other mission to spread production across.
The Long March 10 family is broader. The single-core Long March 10A is rated at about 14 metric tons to low Earth orbit and is aimed at crew rotation to the Tiangong station and heavier satellite work. The reusable 10B recovers boosters for uncrewed flights. Three vehicles share a core, an engine, and a factory.
Who Should Care About Which
Anyone tracking the crewed lunar timeline should watch the Long March 10, because it is the schedule item China’s stated 2030 goal turns on. An orbital test flight moving earlier or later moves the whole program with it.
Anyone comparing launch economics should look elsewhere. Neither rocket is a commercial vehicle, neither has a market price, and both are expendable government hardware built for one mission type. Readers weighing cost per kilogram to orbit are better served by Falcon 9 or the reusable programs covered on the China reusable rockets page.
Readers looking for the largest rocket ever built will not find it here either. Both vehicles sit below the Saturn V and Starship on raw lift, and the most powerful rockets compared page ranks them by thrust.
The Schedules Are Both Under Pressure
Neither program is running to its original date. Artemis has slipped repeatedly since the SLS was authorized, and the landing now depends on a lander that is still in flight testing. China set its own target as before 2030 and has kept restating it, most recently while reorganizing the program’s management.
The two schedules are also linked in a way that raw performance is not. Each side treats the other’s date as a benchmark, which puts pressure on both to fly rather than to wait. That tends to compress test campaigns, and compressed test campaigns have cost crewed programs vehicles before.
What Would Change This Comparison
The first orbital flight of the Long March 10 changes the largest line in the table. Until then, the Chinese column describes design figures and the American column describes flown performance, and those are different kinds of number.
A second change would come from the SLS Block 1B upgrade. NASA plans a higher-energy upper stage on later Artemis missions, which would raise the trans-lunar payload above the Long March 10’s and end the current parity.
A third would come from cost disclosure. If China publishes a per-flight figure for the Long March 10, the comparison gains the axis it is missing. Until one appears, treat any Long March 10 vs SLS cost claim as an estimate rather than a fact, and check NASA’s SLS reference page for the current American figures.