SUIMING TIME LOOP: ECHOING BELL EVENT

Version 1.5’s second wave lands on September 24, 2026, and the most mechanically unusual thing in it is not an operator or a banner. It is a city.

Echoing Bell of an Old City is a guide event built around Suiming, and the pitch is that the entire city functions as one enormous puzzle. Tides move through it, opening and closing routes. A bell reverses time and resets the place around you. What you carry, you keep.

Worth clearing up first, because the name has been misread in a few places: Suiming is a city, not an operator. There is no Suiming character, no banner, and no kit. If you came here looking for a build guide, the confusion is understandable and the answer is that there is nothing to build.

This is a mechanics explainer, not a walkthrough. The event is not live, so nobody has route steps or puzzle solutions, and we are not going to invent them. What we can do is explain how loop-and-persist puzzle design works, because understanding that before you play it is worth more than a partial map.

TL;DR - Key Points

• Echoing Bell of an Old City starts September 24, 2026, in Version 1.5 Phase 2.
• Suiming is a city and a puzzle map, not an operator. No banner, no kit, no build.
• Two systems run simultaneously: tides that continuously open and close paths, and the Waking Bell, which reverses time and resets the city.
• Key items persist across resets. This is the single most important rule in the whole zone.
• The loop has been reported at around 15 minutes, though the official preview did not state a duration.
• Play loop one as reconnaissance. Scouting is worth more than solving when the geography is about to rearrange itself.
• It arrives in a crowded week, alongside free Purrchena and the Yvonne RE-Factor banner.
• No combat gate has been announced. Everything described points at traversal and observation rather than fights.

What Echoing Bell of an Old City Actually Is

It is a guide event, which in Endfield terms means a structured content release with its own reward track rather than a permanent region drop.

The setting is the city of Suiming, presented as somewhere lost to a silent calamity that now reveals a sliver of its memories to whoever walks through it. The stream framing put the narrative and the mechanic in the same sentence, which is usually a sign that the puzzle is meant to be how the story gets told rather than an obstacle between story beats.

Structurally, it is the counterpart to the Snowy Forest. Phase 1 gives you a combat region with an area boss. Phase 2 gives you a puzzle city with a time loop. If you bounced off the Snowy Forest’s enemies, this is the content designed for the other half of the audience.

The entire city is the puzzle, which is a considerably larger claim than “there are puzzles in the city.”

The Two Systems: Tides and the Waking Bell

Almost everything about how Suiming plays follows from these two mechanics interacting.

Tides rise and fall continuously. As they move, paths open and close. A street that was underwater becomes walkable, and a route you were standing in becomes impassable. This is the spatial half of the puzzle, and it means the city has multiple valid layouts rather than one.

The Waking Bell reverses time. It repeatedly resets the city to the moment you first entered, which returns the tide to its starting state and undoes whatever arrangement you had worked the city into. This is the temporal half.

Put together, you get a zone where the question is never simply “how do I get there.” It is “which tide state lets me get there, and can I reach it before the reset.” Reports around the preview describe the loop as roughly 15 minutes, and describe the goal as recovering the parts needed to repair the Waking Bell before a Blight Tide arrives. The official preview program did not state a loop duration, so treat the specific number as unconfirmed and the shape as reliable.

Why Persistent Key Items Change Everything

Here is the rule that decides whether this zone is good or miserable: important items carry over between resets.

That sounds like a small quality-of-life concession. It is actually the whole design. Consider the two possible versions:

With persistence, each loop is strictly additive. You come out of loop three holding what you found in loops one and two, so the city gets easier every time even though it looks identical. The reset stops being a failure state and becomes something closer to a rewind button you can use deliberately: get to an awkward spot, grab the thing, and let time undo the mess you made getting there.

That is a genuinely elegant structure, and it is the reason this event is worth paying attention to rather than skipping as filler. Time-loop zones live or die on exactly this question, and Endfield has put it on the right side of the line, at least on paper.

How to Play Your First Loop

Since items persist and layout resets, the optimal opening is not the intuitive one. Do not try to solve anything on loop one.

• Scout, do not solve. Your first pass is reconnaissance. The city will look the same next time, so anything you learn is permanently useful.
• Note what is blocked and when. The tide state is the variable. Knowing that a particular route only opens at high water is the actual puzzle knowledge.
• Mark what you saw but could not reach. These are your objectives for later loops, and they are much easier to find again than to notice for the first time.
• Grab anything grabbable immediately. If items persist, a pickup taken in the first two minutes of loop one is banked for every loop after. There is no reason to defer one.
• Let the reset happen. Fighting the timer on your first pass wastes the loop you should be spending on learning the map.

None of that requires knowing the puzzle solutions, which is the point. It is how you play any loop-and-persist zone well, and it will still be correct on September 24.

What “Guide Event” Means for Your Rewards

Guide events in Endfield come with their own reward tracks, and those tracks are time-limited even when the content is not.

Endfield has been consistent about keeping narrative event stories playable after their event windows close, which they confirmed again for Trial of the Bow in this same version. Whether that applies to Echoing Bell of an Old City specifically has not been stated. The safe assumption is that the story may stay and the rewards will not, so if the reward track matters to you, treat September 24 as a real deadline.

Plan around the week rather than the event in isolation. Phase 2 drops the free Purrchena giveaway, the Yvonne RE-Factor banner, and the Tag Artist Issue weapon banner on the same day. If you are budgeting attention rather than resources, the puzzle city is the part that will still be there next weekend and the banner decision is the part that will not, and our RE-Factor Headhunting analysis covers that side of the week.

Where This Could Still Go Wrong

We flagged this in our 1.5 preview coverage and it is worth restating, because “persistent items” solves one problem and not all of them.

Reset friction is the risk. Persistent key items mean you do not lose progress, but they do not mean you avoid repetition. If reaching the interesting part of the city takes six minutes of the same traversal every loop, the zone will feel tedious long before it feels unfair. The difference between a good loop puzzle and a bad one is usually how quickly it lets you skip the parts you have already solved.

The other unknown is signposting. A city-sized puzzle with a shifting layout needs to tell you what changed and why. If the tide state is hard to read at a glance, the puzzle stops being about deduction and starts being about trial and error with a timer attached.

Neither of these is a prediction. Both are the specific things to judge it on in the first hour.

What to Do Before September 24

Short list, because there genuinely is not much.

1. Do not build a team for it. Nothing announced suggests a combat gate, and building for an unannounced puzzle is the least productive prep available.
2. Finish the Phase 1 content first. The Snowy Forest and the Trial of the Bow both land earlier in the month, and Phase 2 arrives while they are still open.
3. Settle your banner plan. Phase 2 is the crowded week. Deciding about Yvonne in advance means the puzzle city gets your attention instead of your resource anxiety.
4. Claim your free Purrchena on the same day. It is a login, it costs nothing, and it is the easiest thing to forget in a busy week.

What We Still Do Not Know

1. The confirmed loop duration. Reported at around 15 minutes, not stated in the official preview.
2. Exactly which items persist. “Important items” is the published wording, and the boundary matters a great deal.
3. Whether the story stays playable after the event. Consistent with past behaviour, not confirmed here.
4. How large Suiming actually is. “City-sized” is a description, not a scale.
5. Whether there is any combat requirement at all. Nothing suggests one, and nothing rules one out.

Final Read

Echoing Bell of an Old City is the most interesting design idea in Version 1.5, and it is arriving in the week where it will get the least attention, sandwiched between a free operator and a new banner type.

The mechanic is sound on paper. A city with a shifting tide, a reset that returns the layout but not your inventory, and a difficulty curve that bends downward as you accumulate objects is a genuinely good structure for a puzzle zone. The thing to watch is friction: whether it lets you skip what you have already worked out, and whether it makes the tide state legible enough to reason about.

Play loop one as a scouting run, grab everything you can reach, and let the bell do its thing. We will publish a proper route breakdown once the city is walkable and there is something real to map.

Frequently Asked Questions

When does Echoing Bell of an Old City start? September 24, 2026, as part of Version 1.5 Phase 2. It arrives in the same wave as the free Purrchena giveaway and the Yvonne RE-Factor banner, so Phase 2 is a busy week.

What is Suiming in Arknights: Endfield? Suiming is a city, not an operator. It is a new puzzle exploration map in Version 1.5 where the entire city functions as one large puzzle, reached through the Echoing Bell of an Old City guide event. Tides open and close routes while the Waking Bell repeatedly resets time.

How does the Suiming time loop work? Two systems run at once. Tides rise and fall continuously, opening and closing paths through the city as they move, and the Waking Bell reverses time, resetting the city to the moment you first entered. The important concession is that key items you collect carry over between resets, so progress accumulates even though the geography does not.

How long is the Suiming time loop? Coverage of the preview has reported a loop of roughly 15 minutes, though the official preview program we covered did not state a duration. Treat the exact figure as unconfirmed until the event is live, and plan around the mechanic rather than the timer.

Do you lose progress when the Suiming loop resets? No, and this is the design decision that makes the zone work. Important items persist through resets. What resets is the city itself: the tide state, the open and closed routes, and your position in it. You keep what you found and lose only the arrangement you found it in.

Is Suiming a limited-time event? Echoing Bell of an Old City is a guide event starting September 24, so its reward period is time-limited. Endfield has been consistent about keeping narrative event stories playable after their windows close, but that has not been confirmed specifically for this event, so play it live if the rewards matter to you.

What should I do on my first Suiming loop? Scout rather than solve. Because items persist and geography resets, your first pass is worth more as reconnaissance than as a solving attempt. Note where routes are blocked, which paths open as the tide moves, and where you saw something you could not reach yet.

Do I need a specific team for Suiming? Nothing announced suggests a combat gate. It is described as a puzzle exploration map built around traversal and environmental clues rather than fights, so exploration comfort and mobility are more likely to matter than damage. Do not build a team specifically for it before the event is live.

Endfield Hub is a fan-made resource for Arknights: Endfield and is not affiliated with Hypergryph or Yostar. Echoing Bell of an Old City is not live yet, and we will publish a full Suiming route breakdown once the city is playable.