There is no confirmed builder, no published tonnage, and no confirmed commissioning date for the Dongxiu 912-class repair dry dock, a gap stated plainly here rather than filled with guesswork. What is documented comes almost entirely from a single open-source naval reference and the vessel's own name, which under PLAN convention encodes its fleet assignment and hull number.¹ The ship's name is drawn directly from its hull number, 912, following a PLAN naming pattern used across many small Chinan auxiliary classes.

PLAN auxiliary ships carrying a two-character-plus-number designation are named for their assigned fleet and a sequential hull number. The first character marks the fleet, Dong (东, East) for the East Sea Fleet, Bei (北, North) for the North Sea Fleet, and Nan (南, South) for the South Sea Fleet.¹ Dongxiu 912's Dong prefix places it with the East Sea Fleet, which covers the East China Sea and the approaches to Shanghai and Zhejiang province, rather than the South Sea Fleet installations built around Hainan Island that host China's newer, much larger dry docks.

{{photo-req side=right q="Type 037 Hainan class submarine chaser China" caption="A Type 037-class (Hainan-class) submarine chaser, the kind of small combatant the Dongxiu 912-class repair dry dock was built to service." alt="Chinese Type 037 Hainan-class submarine chaser at sea"}}

As a repair dry dock rather than a repair ship, the Dongxiu 912-class vessel is best understood functionally as a floating structure that floods its ballast tanks, receives a vessel over its submerged deck, then pumps the water out to lift the hull clear of the sea for underwater hull work, propeller and rudder repairs, and hull-coating maintenance. It does not sail alongside a task force carrying onboard workshops the way a true repair ship does. Wikidata's structured record for the class lists it as unarmed, without aircraft, and without electronic-warfare fit, consistent with a support asset that never operates independently in a combat role.¹ No published source gives the dock's length, width, or lift tonnage, and none confirms whether the design is self-propelled or must be towed between locations, an important practical distinction for a repair asset that other, better-documented PLAN dry docks resolve in very different ways.

China's most publicized floating dry dock is a different, far larger vessel, the self-propelled Huachuan No. 1, launched in March 2016 and built to carry cruiser, destroyer, and submarine-sized hulls out to sea for repair in waves up to two meters high, a capability explicitly marketed as extending repairs beyond fixed coastal yards.³ The Dongxiu 912-class repair dry dock predates or at least sits apart from that program, serving a far smaller class of ship at a fixed or lightly mobile location rather than a mobile at-sea repair role.

The documented history of the Dongxiu 912-class repair dry dock is essentially a single data point, confirmed active service as of the mid-2010s, with no earlier construction date, launch date, or shipyard of origin established in open sources.¹ That silence is itself informative. Corvette-sized auxiliary support vessels like a single repair dry dock rarely attract the same commercial-satellite and enthusiast-tracking attention as capital ships, and PLAN does not routinely publish service histories for hull-repair infrastructure the way it does for destroyers or submarines.

{{photo-req side=left q="Chinese navy shipyard dry dock repair facility" caption="A Chinese naval repair facility. PLAN has expanded dry-dock and repair infrastructure significantly across its coastal bases since the mid-2010s." alt="Dry dock facility at a Chinese naval shipyard"}}

The broader trend around the Dongxiu 912-class repair dry dock is easier to document than the ship itself. Chinese naval repair infrastructure expanded substantially through the 2010s and 2020s, from the self-propelled Huachuan No. 1 in 2016 to major new dry-dock and quay construction at South Sea Fleet bases on Hainan Island, built to service everything from submarines to aircraft carriers.^3,4 The Dongxiu 912-class dry dock sits at the opposite end of that build-out, a small, unglamorous facility keeping the Type 037 submarine chaser fleet running rather than servicing capital ships, but it reflects the same institutional priority, reducing how often a PLAN combatant has to leave service entirely for routine maintenance.

The Type 037-class hulls the Dongxiu 912-class dry dock was built to maintain were themselves built in large numbers, over 100 units across several sub-variants, with a portion exported to Bangladesh, Egypt, North Korea, Pakistan, and Myanmar as newer Chinese submarine chasers gradually replaced them in PLAN service.² A dedicated repair dry dock sized for that class only makes sense while a meaningful number of Type 037-family hulls remain active, which places the Dongxiu 912-class repair dry dock's service life on the same general clock as the corvettes it exists to support.

The sole confirmed operator of the Dongxiu 912-class repair dry dock is the People's Liberation Army Navy, with one unit in active service and no export or foreign use recorded anywhere in open sources.¹ The Dong character in its name points to assignment with the East Sea Fleet, whose area of responsibility runs along the East China Sea coast, though no source independently confirms the vessel's exact home port. No second unit, sister ship, or planned follow-on class has been identified, and it remains unclear whether Dongxiu 912 is a true one-off design or simply the only unit of a small class that open-source tracking has managed to positively identify so far.

A more useful comparison than any single named rival is the contrast between the Dongxiu 912-class repair dry dock and China's own self-propelled Huachuan No. 1, because the two vessels sit at opposite ends of the same repair-infrastructure question. Huachuan No. 1 is designed to sail with or near a task force and lift cruiser, destroyer, and submarine-sized hulls at sea, explicitly framed by Chinese state media as moving repair capability away from fixed coastal yards.³ The Dongxiu 912-class dry dock, by contrast, appears to serve a single class of small combatant, the Type 037-family corvette, and nothing in open sources suggests it shares that at-sea mobility. It is a support asset built around one job, not a flagship capability China has chosen to publicize.

Set against Western navies, the closer functional match is a true self-propelled repair ship such as the US Navy's Vulcan-class, which carries onboard workshops, cranes, and technicians to a fleet anchorage rather than lifting a hull physically out of the water. That is a real split in naval maintenance approach, dock the ship versus bring the workshop to the ship, and the Dongxiu 912-class repair dry dock represents the dock side of that divide for a Chinese corvette fleet that, unlike a US carrier strike group, mostly operates within reach of its own coastline anyway.

What is the Dongxiu 912-class repair dry dock? It is a Chinese naval auxiliary vessel, a floating dry dock operated by the People's Liberation Army Navy and built to lift smaller warships out of the water for underwater hull, propeller, and rudder repairs.¹

What ships does the Dongxiu 912-class repair dry dock service? Open-source references tie it specifically to the Type 037-class submarine chaser (Hainan-class) family, one of PLAN's most numerous small-combatant classes.^1,2

Is the Dongxiu 912-class repair dry dock still in service? The only confirmed status is active as of the mid-2010s. No later confirmation or decommissioning report has surfaced in open sources, so its current status cannot be stated with confidence.

How many Dongxiu 912-class dry docks were built? Only one unit is confirmed. Whether the class designation implies planned or existing sister ships is not established in available sources.

Where is the Dongxiu 912-class repair dry dock based? Its name suggests assignment with the East Sea Fleet, but no source gives an exact home port.