Quick answer: Reinforced Bowstring is in a gold-lacquer chest in the carpeted room of the Black Serpent House, Village of Lu. It Soul Tempers the Feather Bow.
Where to get Reinforced Bowstring
Travel to the Village of Lu and enter the Black Serpent House, one of the four Serpent Houses. Inside, look for the carpeted room. It holds a gold-lacquer chest. Open it to add Reinforced Bowstring to your inventory.
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The item card reads:
Even today, some still mix animal sinew with hemp, twist them into cords, then repeatedly wax and dry them in the shade to make bowstrings.
The bowstring-making craft of the older generation of archers has not been lost.
Its effect line reads: “Used to Soul Temper the Feather Bow.”

What Reinforced Bowstring does
Reinforced Bowstring has one job. It Soul Tempers the Feather Bow and nothing else. To do it, bring the following:
- The Feather Bow
- One Reinforced Bowstring
- 5,000 Remnant Dust
To upgrade the bow, find Myst in the Order’s tavern beneath Pangzhen and Soul Temper it. The process uses up both the Remnant Dust and the Reinforced Bowstring.
Once tempered, the Feather Bow gains the Precision Shot upgrade. Its effect reads: “While charging, Soul’s hand briefly glows. Release Phantom Edges with precise timing as it glows to greatly increase the shot’s damage and Sha-Chi depletion.”






