Most agent comparisons are organised by agent: a column for each, a row for fees, photos, support. This one is organised by input, because the only difference between Superbuy and CnFans that anybody can verify from outside is what each does with the link you hand it — and that changes depending on which of four shapes you were sent. Those four are a Weidian product page, a Taobao or Tmall page, a 1688 offer, and the thing somebody pastes into a Discord that turns out to be none of them.
The two builders
The buy link this site emits for Superbuy is built one way only. The entire source URL is percent-encoded and hung off a single parameter on a buy page, under an explicit English-language path segment, with a partner code alongside. Weidian, Taobao and 1688 all travel through that exact shape. No branch.
The CnFans link has a branch. It first tries to take the item apart: pull the numeric item id out of the URL, work out which of the three marketplaces it came from, and emit a link naming both. When that fails it falls back to handing over the whole encoded URL, the same way Superbuy always does.
One agent's link has one mode; the other's has two. Everything below is a consequence.
Four shapes of link, and what comes out
A clean Weidian product URL
Weidian puts the item number in a query parameter on the product page, which makes it the easiest of the three to read. The CnFans link comes out in its parsed form: a marketplace token, the bare item number, the referral number. The Superbuy link comes out as the encoded URL, unchanged in substance.
Both work. The difference is legibility: you can read the item straight off the CnFans link and cannot read it off the Superbuy one without decoding it.
A Taobao or Tmall page
Taobao and Tmall both hang the item number off a short, two-letter query parameter, and the two hosts are treated as one marketplace. Same outcome as Weidian: CnFans parsed, Superbuy encoded whole.
The wrinkle here is that Taobao product URLs in the wild carry a long tail of tracking and session parameters. That tail rides along inside the Superbuy link, because the whole URL goes in, and does not ride along in the parsed CnFans link, because only the id survives. Neither is a problem. It does mean the two links can differ wildly in length for the same item, which trips people up when they are checking that a friend sent them the right thing.
A 1688 offer page
1688 is the odd one out: its offer number is not a query parameter at all, it sits inside the path, on a page whose filename is the number. That is why a 1688 link can be parsed at all — the id is recoverable from the shape of the path.
Both agents handle it. Worth knowing separately: 1688 is a wholesale platform rather than a consumer one, with its own conventions around minimum quantities, which is a different question from whether the link resolves. What 1688 is covers that, and the three marketplaces compared covers why sellers list the same item on more than one.
A link with no item id in it at all
This is where the two builders diverge and where most real-world trouble lives. App share links, shortened redirects, a URL somebody retyped off a screenshot, a store's front page rather than a product page, a Yupoo album — none of these contain a marketplace item number in a recoverable position.
For Superbuy nothing changes: the whole string goes into the parameter, exactly as before, and whether it resolves is up to the agent. For CnFans the branch fires and the link falls back to the same whole-URL shape. On an unparseable link the two become structurally the same thing, and CnFans' extra machinery has bought you nothing.
The rule that falls out of this is not about either agent. Save the marketplace URL, not the agent URL. The link decoder reads an item back out of the shape of any of the eight agents' links without a network call, so a dead 2024 agent link usually still resolves — but only when there was an id in there to find.
The failure this actually predicts
A link that will not parse is sometimes a symptom rather than a formatting problem: there is no marketplace page because the seller does not have one. That situation is on the record here. In May 2024 a buyer on r/fashionreps2 wrote about trying to buy from a seller with no Weidian or Taobao presence:
So currently, Superbuy is also not allowing purchases from FakeLab as it’s a ‘offline’ store (not weidian/ taobao).
u/[deleted], r/fashionreps2, 19 May 2024
Another commenter in the same thread described the workaround, which is to get the seller to create a listing rather than to fix the link:
offline means buy from WeChat directly without weidian or tabao This not mean selller not online You can use Superbuy order and ask fakelab send you weidian links to you
u/OperationNarrow6474, r/fashionreps2, 19 May 2024
Both are quoted in full with their threads on the FakeLab evidence page. We are not extrapolating from two comments to a current policy at either agent — that thread is over two years old. The durable part is the mechanism: an agent buys from a marketplace, so an item with no marketplace listing is a request rather than an order, and the answer depends on the agent's rules that week. Ask before you pay, not after.
The numbers deliberately absent from the page above
No fee percentages for either agent appear above. We have not audited them, both revise their own terms without announcing it, and a confidently stated stale number is how bad information survives in this hobby for years. The shape of the charge stack is the same at both, and which line usually decides your total is how agent fees work.
Nobody writing this has placed an order through Superbuy or CnFans. There is no timing data, no QC photo comparison, no dispute record, and no matched basket priced at both in the same week. Every agent link on this site carries a referral code and we earn on signups, which is disclosed in the methodology and is exactly why no name is handed to you here.
Doing the comparison yourself
Take the link you were actually sent — not a hypothetical — and run it through the decoder. If it comes out parsed, you have a durable artifact and both agents will behave. If it comes out in fallback form, that is your signal to go back to whoever sent it and ask for the marketplace page before you spend anything.