[Tier Four Armor Improvement: Additional consumption of Iron ×120, Coarse Forged Steel Plate ×5, Re-forged Steel Plate ×2, Coarse Forged Copper Plate ×2, Copper ×30, Secret Silver Melting Water ×5, spending 40 minutes construction time, can carry out [Tier Four Armor Improvement] for any tier of wall with a length not exceeding ten meters, granting the wall section an additional 5500 Durability Value and 55 Double Resistance]
[Tier Five Armor Improvement: Additional consumption of Iron ×200, Refined Steel Plate ×5, Re-forged Steel Plate ×10, Reforged Copper Plate ×5, Secret Silver Melting Water ×10, Refined Forging Alloy ×10, Refined Gold ×10, spending 80 minutes construction time, can carry out [Tier Five Armor Improvement] for any tier of wall with a length not exceeding ten meters, granting the wall section an additional 12500 Durability Value and 125 Double Resistance]
