May 22, 2026
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HOI IV | Open Beta Update VI

3/5 Moderate

BETANationalist China receives massive focus tree speed buffs alongside a significant nerf to submarine escape rates and major naval AI improvements.

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Key Changes

  • 1Nationalist China focus times reduced from 70 to 35 days for 22 focuses
  • 2Submarine escape progress reduced from 50% to 35% per day while hidden
  • 3Planes destroyed by anti-air and raids now correctly count toward war participation
  • 4AI naval repair logic improved to reserve more dockyards and fix critical damage
  • 5Lend-lease UI now automatically calculates maximum convoy capacity for the receiver
  • 6New event added for Nine-powers treaty signatories when China is attacked
  • 7Fixed multiple crashes related to SAM missions, Mac peace conferences, and late-game scientists
  • 8British Raj focus tree bugs fixed regarding resource distribution and synthetic refineries

All Changes

🏳️Factions(6)

  • buffNationalist China: Reduced focus time from 70 days to 35 days for 22 focuses across Industry, Army, Air, Navy, and Politics branches
  • buffNationalist China: Moved 'Construct the Banqiao Dam' earlier in the focus tree
  • changeNationalist China: Changed prerequisites for 'The National Sun Yat-sen University' to match the new tree layout
  • fixRaj: Fixed 'Mixed Economy' giving resources on all owned states instead of starting states and added coal
  • fixRaj: Fixed 'The riches of the Raj' to correctly check for synthetic refineries
  • fixRaj: Fixed 'Acquire new Resources' to ensure resources are granted to the correct state

Naval Systems(4)

  • nerfSubmarines: Submarines now escape at 35% progress per day if hidden, reduced from 50%
  • changeLend-lease: Lend-lease UI now defaults to the maximum amount the receiver can handle with their convoys
  • buffLend-lease: Convoy limits are now ignored when sending convoys as part of a lend-lease
  • fixConvoys: Fixed a bug where naval supply tooltips showed a much larger number of required convoys than actual demand

🤖AI Behavior(5)

  • changeUSA: Updated naval templates and overall strategy for the United States
  • changeUK: Updated ship templates for the United Kingdom and generic AI nations
  • changeAI: AI now reserves more dockyards specifically for ship repairs
  • changeAI: AI will now continue repairing ships until all critical damage is resolved
  • changeUK: UK AI now prioritizes building up North Africa ports to facilitate pushing toward Tobruk

🎮Gameplay Systems(2)

  • newNine-powers treaty: Added a new event that fires for all Nine-powers treaty signatories when China is attacked
  • fixWar Participation: Fixed a bug where planes destroyed by static anti-air or raids did not count toward war participation

🐛Bug Fixes(6)

  • fixSAM Mission: Fixed a crash occurring when a SAM mission was set to a naval region
  • fixMac: Fixed a crash occurring on Mac during peace conferences
  • fixScientists: Fixed a crash that could occur with scientists in the late game
  • fixConvoys: Resolved an issue where emergency convoy demand would scale infinitely
  • fixShips: Fixed a bug where ships gaining strength through doctrines would appear damaged upon reloading a save
  • fixPerformance: Optimized GPU buffer creation by running the first map of the frame with DISCARD

Summary

Nationalist China Overhaul

Nationalist China has received a substantial balance pass, with 22 focuses across all major branches (Industry, Army, Air, Navy, and Politics) having their completion time halved from 70 days to 35 days. Additionally, the focus tree layout has been adjusted to move the Banqiao Dam earlier in the progression.

Naval & AI Adjustments

Submarines are now easier to catch, with their hidden escape progress reduced from 50% to 35% per day. The AI has been significantly upgraded to better manage naval repairs, reserving more dockyards and ensuring ships stay in repair until critical damage is resolved. The USA and UK have also received updated ship templates and strategies.

Gameplay & Bug Fixes

Lend-lease logic has been improved to automatically default to the maximum amount a receiver's convoys can handle. Critical bug fixes include a correction to war participation, ensuring planes destroyed by anti-air or raids now properly count toward a nation's score, and several fixes for the British Raj's resource focuses.