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Genshin Impact

Bygone Times Like Dust Passing

Shane Williams

This is a walkthrough for the Archon Quest, Bygone Times Like Dust Passing which is the third quest of the Interlude Chapter Act 1. It’ll navigate you through the necessary steps to finding Starsplinter Iron and Subrosium.

Xiao is taking in the scenery.

Adventure EXP Mora Other Rewards Requirements Next Quests
Genshin Impact Screenshot Genshin Impact Screenshot heros_wit_Items_Genshin_Impact.png Genshin Impact Screenshot Complete Seagaze Sunset Where the Heart Finds Rest


Only two materials left to find. Time to ask around at the worksite.


  1. Ask Master Zhang about Wonder Cores
  2. Use Visions to find the Starsplinter Iron
  3. Ask the old man for information about Subrosium
  4. Search for records left behind in the village
  5. Look for Subrosium

Ask Master Zhang about Wonder Cores

Return to where the Jade Chamber is located outside of the The Golden House and speak with Beidou and Yun Jin, then head back into Liyue Harbor and make your way over to the Blacksmith Master Zhang. Here you’ll be trying to gather information on the Wonder Cores, but Master Zhang mentiones that you’ll need to bring him some Subrosium and Starsplinter Iron..

(1 of 2) Speak with Master Zhang in Liyue Harbor

Speak with Master Zhang in Liyue Harbor (left), then go south west of Mt. Tianheng and collect the two pieces of Starsplinter Iron. (right)

Use Visions to find the Starsplinter Iron

After the conversation has come to a close, use the teleport southwest of Mt. Tianheng, then walk behind you a few meters to initiate another scene. Following the scene you’ll need to find two pieces of Starsplinter Iron, so climb up to the top of the nearby rock to find the first piece then look directly ahead to find the second.

Ask the old man for information about Subrosium

From where you collected the last piece of Starsplinter Iron, head over to the village southwest and speak with the villager to see if he has any information on where to find Subrosium.

(1 of 3) Interact with the points of interest around the village until you find the whereabouts of Subrosium

Search for records left behind in the village

Climb up the wall to the left of the villager and interact with the golden marker near the destroyed wooden shack, then enter the abandoned building and interact with another marker near some barrels to discover some backstory on Shenhe’s father. Next up, head up the stairs and enter another broken building to find the final marker which will point you in the right direction of Subrosium.

Look for Subrosium

Return to Shenhe who can be found standing near the villager, then after the conversation walk over to the rock in the center of the lake and forward the time to 17:30 to initiate a short scene. Walk over to the west side of the lake and you’ll see the Subrosium sitting nicely opposite Xiao. Finally, return to the Blacksmith Master Zhang in Liyue Harbor to trigger a scene which will then bring this quest to a close.

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Guide Information
  • Publisher
  • Platforms,
    Android, iOS, PC, PS4, PS5, Switch
  • Genre
    Action RPG, Adventure
  • Guide Release
    31 October 2020
  • Last Updated
    31 July 2023
    Version History
  • Guide Author

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This guide for Genshin Impact includes the following:

  • Based on version 3.0.
  • An interactive Map of Teyvat showing the location of all; Anemoculus, Geoculus, Statues of the Seven, World Quests, Shrines, Plants, Monsters, Enemies, Chests and Minerals.
  • Knowledge on all of the current known regions of Teyvat.
  • Detailed Character pages of all playable characters showing talent trees, skill builds and Ascension tables.
  • Character Tier Lists.
  • Combat Information and Elemental Effects & Combinations.
  • Weapons - Showing the current best and highest rated weapons in the game.
  • All Archon Quests including the new Sumeru Archon Quests.
  • All World Quests that are unlocked by speaking to NPCs through Teyvat. They give insight into the various locations and stories of the world.
  • All Story Quests consisting of chapters related to the background and personalities of each playable character.
  • All Domains laid bare with expert strategies including the new Sumeru Domains.
  • How to conquer the Spiral Abyss.
  • All Weekly Bosses covered with expert strategies.
  • How to get all the optimal outcomes on Hangout Events
  • Housing guide using the Serenitea Pot including a full blueprint and furnishings list.
  • All details on Gardening and Fishing.
  • Bonus Content, including Interviews from voice actors.

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