If you’re trying to optimize Yazhen Solution production in Wuling and your factory keeps stalling because of Ferrium shortages, take a breath — you’re not messing up.
This is one of the most common early game production problems in Arknights: Endfield, and it happens even with correct ratios and clean layouts. The issue isn’t your design — it’s Ferrium supply.
Here’s how Yazhen Solution production actually works in Wuling, why it breaks, and the best early-game fixes that actually work.
Why Yazhen Solution Production Breaks in Wuling
Let’s start with the core problem: Wuling does not produce enough Ferrium to sustain full Yazhen Solution output.
A standard Yazhen Solution setup requires:
- 10 Ferrium Parts
- 5 Yazhen Water Bottles
- Ferrium Bottles use a 2:1 ratio
- Ferrium Parts use a 1:1 ratio
On paper, this already makes Yazhen one of the most Ferrium-heavy recipes in the early game.
The hard limit in Wuling
Even at Regional Development Level 4 (max ore purity), Wuling caps out at roughly:
- ~90 Ferrium per minute from local mining
- ~25 Ferrium per minute from regional transfer
That’s ~115 Ferrium/min total.
Most efficient Yazhen Solution factory setups consume ~120 Ferrium/min.
That missing 5 Ferrium per minute is why production keeps stalling.
Important Early-Game Reality Check
This isn’t a mistake or a hidden upgrade you haven’t unlocked yet.
- Regional Development Level 5–6 does not increase mining output
- It only boosts protocol capacity and ziplines
- There are currently limited Ferrium nodes in Wuling
In other words: you cannot “fix” this locally.
Early-game Yazhen Solution production in Wuling is intentionally constrained.
Best Ways to Fix Ferrium Shortage in Wuling (Ranked)
1. Import Ferrium From Valley IV (Best Overall Fix)
The intended solution is pulling Ferrium from Valley IV.
By setting up regional transfer, you can add roughly:
- +25 Ferrium per minute
This won’t fully remove the bottleneck, but it gets you close enough to stabilize production.
2. Stockpile Ferrium in the Wuling Depot (Most Reliable Early Fix)
This is what most experienced players actually do:
- Manually transfer large amounts of Ferrium
- Fill the Wuling depot
- Let Yazhen Solution production run continuously
With a full stockpile, your factory can run for several days or even a week before needing a refill.
It’s not elegant automation — but it completely solves early-game frustration.
3. Reduce Yazhen Solution Output Slightly (Cleanest Fix)
If your factory targets 120 Yazhen/min, drop it to 110–115/min.
This:
- Matches real Ferrium supply
- Prevents machine idling
- Keeps production stable without babysitting
Steady output > theoretical max.
4. Automate Ferrium Mining When Available
Once Electric Mining Rigs and stronger power networks are unlocked, automate Ferrium extraction in Valley IV.
This doesn’t instantly fix Wuling, but it:
- Reduces manual transfers
- Makes your setup future-proof
- Prepares you for higher Yazhen demand later
Should You Rebuild Your Yazhen Factory?
Only if you’re overbuilding.
Ask yourself:
- Are machines idle because Ferrium is missing?
- Or because you built more processing than supply allows?
If Ferrium is the issue, rebuilding won’t help. The bottleneck is upstream.
The smarter move is capping production to match actual Ferrium per minute, not theoretical ratios.
Quick Fix Summary (For Skimmers)
- ❌ Wuling alone cannot sustain full Yazhen Solution production
- ✅ Import Ferrium from Valley IV
- ✅ Stockpile Ferrium in the Wuling depot
- ✅ Reduce Yazhen output to ~115/min
- ❌ Regional levels won’t fix mining output
Final Verdict
If you’re struggling with Yazhen Solution production in Wuling, you’re playing the game correctly.
This bottleneck is part of Endfield’s early-game pacing, not bad factory design. Once you accept that Ferrium is the limiting factor — and plan around it — the entire system becomes much smoother.