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  • Units
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    • VillagerVillager
    • Imperial OfficialImperial Official
    • TraderTrader
    • City GuardCity Guard
    • Provincial LevyProvincial Levy
    • MonkMonk
    • Ranged SpecialistsRanged Specialists
    • Imperial RetinueImperial Retinue
      • Infantry
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    • Zhuge NuZhuge Nu
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    • CrossbowmanCrossbowman
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    • HorsemanHorseman
    • LancerLancer
    • Yuan RaiderYuan Raider
    • Imperial GuardImperial Guard
      • Siege
    • Battering RamBattering Ram
    • Siege TowerSiege Tower
    • SpringaldSpringald
    • Nest of BeesNest of Bees
    • Counterweight TrebuchetCounterweight Trebuchet
    • BombardBombard
      • Ships
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    • Explosive JunkExplosive Junk
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    • BaochuanBaochuan
  • Buildings
      Landmarks
    • Capital Town CenterCapital Town Center
    • Jiangnan TowerJiangnan Tower
    • Meditation GardensMeditation Gardens
    • Mount Lu AcademyMount Lu Academy
    • Shaolin MonasteryShaolin Monastery
    • Temple of the SunTemple of the Sun
    • Zhu Xi's LibraryZhu Xi's Library
      • Economy
    • FarmFarm
    • HouseHouse
    • Lumber CampLumber Camp
    • Mining CampMining Camp
    • MillMill
    • PalisadePalisade
    • Palisade GatePalisade Gate
    • BarracksBarracks
    • GranaryGranary
    • VillageVillage
    • DockDock
    • PagodaPagoda
    • Town CenterTown Center
    • MarketMarket
    • Archery RangeArchery Range
    • StableStable
    • BlacksmithBlacksmith
    • Stone WallStone Wall
    • Stone Wall GateStone Wall Gate
    • Siege WorkshopSiege Workshop
    • MonasteryMonastery
    • UniversityUniversity
      • Military
    • OutpostOutpost
    • Stone Wall TowerStone Wall Tower
    • KeepKeep
      • Wonders
    • Enclave of the EmperorEnclave of the Emperor
  • Technologies
      Units
    • ForestryForestry
    • Survival TechniquesSurvival Techniques
    • WheelbarrowWheelbarrow
    • Military Affairs BureauMilitary Affairs Bureau
    • Regional InspectionRegional Inspection
    • Single Whip ReformSingle Whip Reform
    • Extended LinesExtended Lines
    • TextilesTextiles
    • Fitted LeatherworkFitted Leatherwork
    • Iron UndermeshIron Undermesh
    • Naval ArrowslitsNaval Arrowslits
    • Specialized PickSpecialized Pick
    • Steeled ArrowSteeled Arrow
    • Double BroadaxDouble Broadax
    • Siege EngineeringSiege Engineering
    • BloomeryBloomery
    • Fortify OutpostFortify Outpost
    • Professional ScoutsProfessional Scouts
    • HorticultureHorticulture
    • Handcannon SlitsHandcannon Slits
    • Dali HorsesDali Horses
    • Armored HullArmored Hull
    • Drift NetsDrift Nets
    • Extra HammocksExtra Hammocks
    • Balanced ProjectilesBalanced Projectiles
    • Greased AxlesGreased Axles
    • Insulated HelmInsulated Helm
    • Shaft MiningShaft Mining
    • Wedge RivetsWedge Rivets
    • Herbal MedicineHerbal Medicine
    • IncendiariesIncendiaries
    • Lumber PreservationLumber Preservation
    • Military AcademyMilitary Academy
    • DecarbonizationDecarbonization
    • Springald CrewsSpringald Crews
    • Springald EmplacementSpringald Emplacement
    • Boiling OilBoiling Oil
    • FertilizationFertilization
    • Bolt MagazinesBolt Magazines
    • Hard Cased BombsHard Cased Bombs
    • Imperial Red SealsImperial Red Seals
    • ExplosivesExplosives
    • Heated ShotHeated Shot
    • Lightweight BeamsLightweight Beams
    • ShipwrightsShipwrights
    • SpyglassSpyglass
    • Angled SurfacesAngled Surfaces
    • Court ArchitectsCourt Architects
    • CupellationCupellation
    • Master SmithsMaster Smiths
    • PietyPiety
    • Platecutter PointPlatecutter Point
    • Siege WorksSiege Works
    • Cannon EmplacementCannon Emplacement
    • ChemistryChemistry
    • Crosscut SawCrosscut Saw
    • GeometryGeometry
    • Incendiary ArrowsIncendiary Arrows
    • Roller Shutter TriggersRoller Shutter Triggers
    • Tithe BarnsTithe Barns
    • Damascus SteelDamascus Steel
    • Swivel CannonSwivel Cannon
    • BiologyBiology
    • Elite Army TacticsElite Army Tactics
    • Precision Cross-BreedingPrecision Cross-Breeding
    • Additional BarrelsAdditional Barrels
    • Thunderclap BombsThunderclap Bombs
    • 10000 Bolts10000 Bolts
    • Advanced AdministrationAdvanced Administration
    • Cloud of TerrorCloud of Terror
    • Dynastic ProtectorsDynastic Protectors
    • Roar of the DragonRoar of the Dragon
  1. Home
  2. Zhu Xi's Legacy
  3. Technologies
  4. Imperial Red Seals
Imperial Red Seals

Economic Upgrade

Imperial Red Seals

Zhu Xi's Legacy

Zhu Xi's Legacy

Imperial Official limit increased by +2. Grants an Imperial Official upon completion.

Patch History

2026-02-04 Patch 15.3.8338

Zhu Xi's Legacy

  • Fixed a bug where cancelling & requeuing the Imperial Red Seals upgrade would spawn extra Imperial Officials once the upgrade was researched.

Research at

    Costs
    100food
    200gold
    45time