Support

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Support is available on business days from 9:00 to 18:00 Beijing time (UTC+8). Messages received outside those hours are handled on the next business day.

Reporting a problem

Send these along with it

Complete information makes it easier to find the cause and verify it again without repeated clarification.

  1. The phone number you sign in with, or your team name
  2. The platform and store where it happened
  3. The product ID or task ID; both can be copied from the list page
  4. The exact error text or a screenshot. A full-screen capture beats a cropped one
  5. Roughly when it happened, to the hour

Please don't send platform account passwords. They stay between you and the platform, and debugging never needs them.

Accounts and sign-in

How do I get an account?

Click Register on the sign-in page and verify your phone number by SMS. If registration is not yet open, contact us and leave a phone number; we will notify that number when the account is ready. The team owner can then add colleagues and assign roles under Settings › Members.

I forgot my password.

The team owner can reset any member's password under Settings › Members. If the owner is the one locked out, contact us; we verify the phone number and reset it.

Can several people share one account?

Please give each colleague their own. Permissions follow roles, and the audit trail only makes sense when it's clear who did what. The Terms of Service limit accounts to use within your own team.

Desktop client and extension

Do I have to install the desktop client?

Use the web workspace to view data, confirm categories and attributes, and manage team members and credits. A few marketplaces require listing steps in a local browser; the desktop client opens a separate store window for those steps.

Where do I download it, and which systems are supported?

The Download app page on the website provides the current download entry for macOS, Windows and Linux. New versions are announced inside the client; download and installation are separate steps so a running batch is not interrupted.

How do I install the browser extension?

The extension is installed on your machine together with the client; there is nothing separate to download. On first use, the client's settings page shows the folder the extension lives in. Follow the on-screen steps to load it once in Chrome's extension manager. Client upgrades update the same folder, so it's a one-time step.

Stores and platforms

How do I connect a store?

The steps differ by marketplace. For Temu, grant permission in Seller Center and paste the authorisation information into Myriad. TikTok Shop and Shopee open the marketplace's own authorisation page. Amazon and Shopify also use official authorisation started from the app store or workspace. Details appear under 'Stores connected through an app store' below.

Which platforms can I list to?

Myriad can list products on Temu, Amazon, SHEIN, TikTok Shop, AliExpress, eBay, Shopify, DHgate, Shopee, Wildberries, Ozon and Coupang. You maintain one product record; the system prepares categories, attributes and image specifications for each platform.

Products and listing

A listing failed. Where do I look first?

Start with the listing details. Every failure explains either what the marketplace reported or what Myriad found before submission. The four most common causes are an image with the wrong size or ratio, a missing required attribute, a category that does not accept products on that site, and an expired store authorisation. Fix the product information and resubmit for the first three; follow the page guidance to authorise the store again for the last.

A category or attribute was chosen incorrectly.

Correct it under Category and attribute confirmation. Myriad remembers the correction so similar products can reuse it next time. If one kind of product keeps receiving the wrong result, send us a few examples; that feedback is used directly to improve the result.

Can I turn off AI rewriting?

Yes. You can decide separately whether titles, descriptions and other content are rewritten, or switch rewriting off entirely. When it is off, the original text is submitted unchanged.

Market signals and margin math

What do the market signals show?

Sales and ranking data from multiple platforms, collected continuously and aggregated at category and price-band level: what's rising, what's fading, where the price bands are crowding. That is where it stops — trend level; how many units one listing will sell is a different question.

How are freight and margin worked out?

Product cost, chargeable weight, fulfilment mode and marketplace fees enter the calculation separately. Freight uses the greater of actual and volumetric weight, with low and high freight assumptions producing a gross-margin range. Results also include break-even price, break-even weight, the estimation basis and costs not yet included.

Credits

Does Myriad cost anything? Where do I see my credits?

Myriad is free to use. Credits are granted when your account is opened and consumed per automatic processing action; balance, allowances and every credit transaction are under Settings › Credits & plan.

Data and account

Where is my data stored, and who can see it?

Data is stored in mainland China. Each team can view and change only its own information, and Myriad continually checks that teams cannot access one another's data. When you list a product, its information goes to the target marketplace at your instruction. Details are in the Privacy Policy and on the Security page.

How do I export or delete data, or close my account?

Email contact@yuhaninfo.cn with your team name and sign-in phone number. Export and deletion requests are handled within 15 business days. After closure, business data is deleted or anonymised within 30 days; transaction records the law requires us to keep are retained for the statutory period.

App stores

Stores connected through an app store

Amazon and Shopify use each platform's official authorisation. Approval happens on the platform's own page. Myriad keeps only the authorisation granted by the platform, which you can revoke at any time.

Amazon Selling Partner Appstore

Amazon

Connecting
Find '万川 Myriad' in the Amazon Selling Partner Appstore and click Authorize now; sign in to your Myriad account, approve, and you're done. You can also start from the Amazon page in the workspace: pick a region and approve in Seller Central. One authorization covers every marketplace in that region.
Permissions used
Creating and updating listings, including price and quantity changes; viewing active listings and inventory; syncing and handling orders (confirming shipment, updating tracking, cancelling). The first sync brings in the last 30 days of orders, without buyer personal information.
Disconnecting
Click Disconnect on the workspace's Amazon page. Myriad deletes the stored authorisation straight away and cancels the notifications it subscribed to on Amazon. To revoke the authorisation completely, remove the app under Manage Your Apps in Seller Central.
Data retention
If the authorisation is disconnected, revoked in Seller Central or no longer accepted, and you do not authorise again within 28 days, Myriad deletes the orders, listings and other data it obtained from Amazon, completing within 30 days of the authorisation ending. Deleting the store inside Myriad removes that data at once.

Shopify App Store

Shopify

Connecting
Find '万川 Myriad' in the app store inside your Shopify admin and install it. After approval you're sent back to the workspace; sign in, and the store is attached to your team automatically.
Permissions used
Creating products and variants, publishing to the Online Store sales channel, setting initial inventory and reading locations, and reading orders plus marking fulfilment or cancellation (last 60 days).
Disconnecting and uninstalling
Uninstall the app from your Shopify admin. Myriad immediately stops using that store's authorisation and deletes store data when Shopify sends its follow-up notice. Buyer personal data never enters Myriad in the first place. Disconnect in the workspace only stops Myriad from accessing the store; uninstall the app itself in Shopify admin.