The blunt facts. 集换社 (jihuanshe) is the Chinese TCGplayer: app-only, mainland-only. Registering needs a +86 phone number and it ships only within China. It has no international shipping and no English version (its one overseas branch is a separate Japan app). So you cannot buy from it directly — you route around it one of three ways.
Route 1 — agent custom order (Superbuy "Expert Sourcing"). A shopping agent's staff in China buy the item for you, receive it at their warehouse, and forward it. Superbuy's Expert Sourcing takes free-form requests and charges about a 10% service fee; normal Taobao/Weidian orders through an agent carry no service fee. No agent lists jihuanshe as a supported site, so a jihuanshe buy is always a manual request — ask their support first whether they will buy from the jihuanshe app before you commit to a big order. Ship many singles as one consolidated parcel.
Route 2 — same cards on Taobao or Xianyu (usually easiest). Most Chinese card shops cross-list on Taobao, and used singles show up on Xianyu (闲鱼). Agents support both natively — that is what the search buttons in the card view are for. Xianyu counts as a used-goods platform: small extra fee, no returns. Other live agents in 2026 if you want alternatives: CSSBuy, Sugargoo (~5%), CNFans, Mulebuy, KakoBuy, Hoobuy.
Route 3 — skip the agent. Chinese export shops sell CN-language singles direct to the West: Dark World Zero (Chengdu; 简中 Pokémon, CN One Piece, Riftbound; PayPal), PokiPair (simplified-Chinese Pokémon specialist), TCG Mikaeru (CN One Piece), plus the big mainland eBay sellers. Prices run above jihuanshe spot but there is zero friction — compare the landed cost before doing agent gymnastics.
Searching jihuanshe well. The app catalogs singles per card, like TCGplayer. For One Piece, search the full card number (OP13-118 style — the number is identical across languages). For Pokémon, search the Chinese card name (皮卡丘ex) — mainland sets have their own codes, so English numbers mean nothing there. Riftbound lives under 符文战场. Same-number cards come in several art versions (异画/SP/漫画 for One Piece, 平卡/闪卡 tiers for Riftbound) at very different prices — always confirm the artwork against the picture here.
Costs to expect (US). Service fee (0–10% by route) + domestic shipping to the warehouse (a few RMB) + international line (roughly $16–25 for the first kg of flat cards) + US customs on everything: the $800 de-minimis exemption ended in 2025, so every parcel from China is now dutiable. Declare truthfully; cards themselves ship with no restrictions.
Pokémon. English index (≈20k physical cards, TCG Pocket excluded) from TCGdex via the weekly michi-binder bake; scans from the TCGdex / pokemontcg.io CDNs. Chinese names are derived: official zh-Hans species names (PokeAPI) + rules for prefixes and suffixes (Mega/超级, Radiant/光辉, regional forms, ex/V/VMAX/VSTAR/GX…) + a small hand-checked list of trainer staples. Amber text means best-guess — confirm against the listing photo. Mainland 简中 sets are separate products with their own set codes (CS…, CSV…, CBB…), so match by name and artwork, not by the English set number.
The "Known 简中 prints" table comes from Cryst's card database of every mainland print (set code + number + rarity), joined by Chinese card name.
One Piece. English card list from the official site (via the punk-records dump); scans from optcgapi (the official EN scans refuse cross-site embedding), falling back to the official Chinese scan. Chinese names come from the official CN site's own card database (onepiece-cardgame.cn), joined by card number — the CN printing keeps the same numbers, only product codes gain a C (OP01 booster = OPC-01). Official mainland branding is 航海王卡牌对战; sellers mostly write 海贼王.
Riftbound (符文战场). English cards and scans from Riot's official gallery API; official Chinese names from the CN site's database (playloltcg.com), joined by collector number. Chinese cards print numbers with a dot (OGN·001/298).
Everything is baked JSON in this repo — the page calls no third-party API at run time except the image CDNs. A GitHub Action refreshes the indexes weekly.