Taibai (XH-02)

Taibai (designation XH-02) is the second ship of the Xihe-class interplanetary exploration mothership and the first Xihe-class vessel assembled at Star Port Station. Named after the ancient Chinese name for the planet Venus—"Taibai"—the name reflects the ship's specialization in inner Solar System and asteroid belt missions. Construction began in December 2054, assembly was completed in October 2056, and the ship was commissioned in April 2057. As of March 2060, Taibai is undergoing post-mission maintenance and preparing for its next assignment.

Taibai follows the nine-module axial spine configuration of the Xihe class, integrating the Perseverance mass-driver propulsion system, an Ark cold-fusion reactor, closed-loop life support, an artificial-gravity habitation ring, and reinforced docking hardware. Compared with the lead ship Xihe (XH-01), Taibai incorporated operational lessons from XH-01's early missions, including improvements to the habitation module and upgraded radiation shielding. The ship is not capable of atmospheric re-entry or planetary landing; surface access is provided by carried Echo shuttles.

Taibai's mission record emphasizes inner Solar System operations, covering the Vesta orbital survey and asteroid belt exploration, Mars expedition support, and Mars One Base resupply—validating the Xihe class's multi-ship production and coordination capabilities.

Design overview

Taibai is the second Xihe-class ship, using an axial-spine multi-module cylindrical layout with an overall length of 83.4 m, a maximum diameter of 25 m at the artificial-gravity habitation ring, a full-load delta-v of about 1,700 km/s, and a maximum payload of 300 t. Functional zones are arranged along the central axis: forward docking hub, command center, artificial-gravity habitation ring, static habitation module, central docking hub, greenhouse module, main storage module, truss section, and propulsion module.

As the second Xihe-class mothership, Taibai benefited from approximately two years of operational feedback from the lead ship Xihe (XH-01). The habitation module's ergonomic interfaces were refined, and radiation shielding received additional composite layers around the command center, living areas, and medical spaces. These improvements enhanced crew safety and comfort on long-duration missions while maintaining the same baseline configuration and delta-v specifications as the lead ship.

Taibai's standard carried-vehicle configuration is two Echo shuttles, used for crew, sample, and light cargo transfer between the mothership and target body surfaces. The ship was the first Xihe-class vessel designated from the construction phase with an inner Solar System mission emphasis, focusing on Mars-system resupply, asteroid belt exploration, and rapid-response near-Earth operations.

Construction

Construction method and innovation

Taibai was the first Xihe-class mothership assembled at Star Port Station, marking the class's transition from "Vulture Shuttle-based free-flying LEO assembly" to "orbital shipyard construction using Star Port Station and Qingtian cargo ships." This shift freed large-module transport and integration from shuttle cargo-bay size constraints, significantly improving construction efficiency and module integration precision.

During construction, Qingtian cargo ships delivered the nine major modules, the artificial-gravity habitation ring, and other large structural components to Star Port Station in batches. The station's orbital shipyard facilities provided a stable assembly platform, environmental control, and maintenance support, allowing Taibai's construction timeline to improve on the lead ship Xihe's approximately 693-day build.

Construction timeline

Taibai's construction benefited significantly from XH-01's operational experience. Habitation module design improvements, radiation shielding upgrades, and docking hub assembly processes all directly applied data accumulated during Xihe's Deep Space Test Mission and Mars Mission Demonstration. Additionally, Star Port Station's shipyard environment allowed more comprehensive subsystem verification during the assembly phase, reducing the subsequent shakedown workload.

Operational history

Shakedown (November 2056 to March 2057)

Taibai began a five-month orbital shakedown in November 2056, covering low Earth orbit, geostationary orbit maneuvers, and lunar orbit round trips. The shakedown phase validated structural integrity, propulsion response, artificial-gravity ring dynamic balance, long-duration life-support capability, and ship-wide thermal control stability. All systems passed validation, with thermal control, communications, and propulsion performance meeting or exceeding design targets.

During shakedown, Taibai also completed its first docking test with Star Port Station, verifying the forward docking hub and central docking hub performance in structural locking, power, thermal control, and data transfer. These tests established the operational baseline for routine mothership servicing and maintenance at Star Port Station. Shakedown concluded in March 2057, and Taibai was formally commissioned in April 2057.

Vesta Mission (May 2057 to January 2058)

In May 2057, Taibai departed low Earth orbit on the Xihe class's first asteroid belt mission—Vesta orbital survey and surface sample collection. This was the first Xihe-class mission beyond Mars orbit into the asteroid belt, and humanity's first crewed orbital survey and surface sampling of Vesta.

During the roughly eight-month round trip, Taibai completed detailed Vesta orbital mapping, surface sample collection, and asteroid-belt deep-space environment assessment. Two carried Echo shuttles handled surface team descent and return, while the mothership remained in a safe orbit for telemetry monitoring, sample reception, and preliminary analysis. The mission validated Xihe-class operations under asteroid-belt radiation conditions, micrometeoroid risk, and extended communication delays.

In January 2058, Taibai returned to Earth with Vesta samples, which were transferred to near-Earth orbital laboratories for detailed analysis. The Vesta mission's success proved that Xihe-class motherships were capable of asteroid-belt deep-space operations, expanding the class's mission envelope from the Mars system to the wider inner Solar System.

Mars Expedition 3 (April 2058 to December 2058)

In April 2058, Taibai executed Mars Expedition 3, conducting crew rotation and resupply transport to Mars One Base. The mission's core objective was delivering a new rotation of construction crew, supplies, and expansion equipment to Mars One Base while returning the previous resident crew to Earth.

Taibai carried two Echo shuttles for crew and cargo ferry between the mothership and the Martian surface. The mothership remained in high Mars orbit while Echo shuttles handled surface rotation, supply unloading, and sample loading. The mission lasted approximately nine months, concluding with a return to Earth in December 2058. Mars Expedition 3's success cemented Taibai's position as a trunk-line platform for Mars base expansion.

Mars Expedition 4 (October 2059 to January 2060)

In October 2059, Taibai returned to Mars for Mars Expedition 4, with the primary objective of supporting Mars One Base expansion. This mission coincided with the critical surface expansion phase of Mars One Campus Alpha; Taibai delivered structural trusses, greenhouse components, and support supplies that were essential for the base's phased construction.

Taibai completed Mars Expedition 4 and returned to Earth in January 2060. The mission validated the continuous resupply coordination model between Xihe-class motherships and Martian surface bases, further demonstrating the feasibility of multi-mothership rotational support for Mars base construction.

Current status (March 2060)

As of March 2060, Taibai has completed post-Mars Expedition 4 maintenance and is undergoing system inspections and servicing in preparation for its next assignment. Maintenance work is being conducted at Star Port Station, covering propulsion system inspection, docking hub seal replacement, life-support loop servicing, thermal control system calibration, and carried-vehicle interface checks. Taibai remains in good active service condition and is one of the most steadily-operating platforms in the Xihe-class fleet.

Specifications

Fleet role

Within the Xihe-class fleet, Taibai is positioned as the primary platform for inner Solar System and Mars-system missions. Unlike the lead ship Xihe (emphasizing technology validation and outer Solar System expeditions) and the third ship Changxi (emphasizing deep-space communications relay deployment), Taibai's mission record concentrates on Mars base resupply, asteroid belt exploration, and near-Earth rapid response, reflecting the Xihe class's flexible division of labor across multiple mission directions.

Taibai was the first Xihe-class ship to extend the class's mission range into the asteroid belt (Vesta Mission, 2057-2058) and consecutively executed Mars Expeditions 3 and 4, establishing the ship as the core Mars base trunk-line resupply platform. Among the three active Xihe-class ships, Taibai has maintained the most consistent operational tempo and accumulated extensive Mars-system operations and asteroid-belt deep-space experience.

As of March 2060, the Xihe-class fleet has three active ships (XH-01 Xihe, XH-02 Taibai, XH-03 Changxi) and one under construction (XH-04). Taibai is in post-mission maintenance and is expected to resume inner Solar System and Mars-system missions after servicing is complete.

See also

• Xihe-class interplanetary exploration mothership
• Xihe (XH-01)
• Changxi (XH-03)
• Stellaria-class interplanetary exploration mothership
• Echo Shuttle
• Star Port Station
• Qingtian cargo vehicle
• Mars One Base
• Vesta