# 心声风云四升级版 / Voice of the Heart: Wind and Cloud IV, Upgraded Edition

> slug: `xsfyssjb` · browser status: `playable` · native port: `40149`

Wind and Cloud IV ("Fengyun," by Sumxin), a MUD set in the world of Gu Long's wuxia novels, originally hosted at sumxin.com/bbs and fy.sumxin.com. The map leans hard into Gu Long's desert-frontier jianghu -- Loulan, Xinjiang, Zangbei, and Liusha's shifting-sand borderlands sit alongside the usual central-plains sects (Huashan, Wudang, Shaolin, the Beggars' Sect). Registration adds an ethnicity choice (0-3) on top of gender, echoing that cross-cultural frontier setting, and a dynamic_npc_quest directory hints at procedurally-assigned NPC quests rather than a purely hand-authored quest list. It is a true source sibling of this collection's "Fengyun IV Decrypted Edition" (fysjmb) -- their d/dreamland/ scene files and much of the map are byte-for-byte identical; it happens to share a similar bug pattern with the unrelated codebase behind this collection's "wqfy" but is not otherwise related to it.

## Play in the browser (WebAssembly)

- Landing page (description + notes): https://mudlibs.fluffos.info/xsfyssjb/
- Play now (boots the WASM driver): https://mudlibs.fluffos.info/xsfyssjb/play.html

## Download source ZIP

- Same-origin ZIP (trimmed source tree, no need to clone the whole repo):
  https://mudlibs.fluffos.info/xsfyssjb/xsfyssjb.zip
- GitHub tree: https://github.com/fluffos/mudlibs/tree/main/libs/xsfyssjb
- README: https://github.com/fluffos/mudlibs/blob/main/libs/xsfyssjb/README.md
- Restoration notes (NOTES.md): https://github.com/fluffos/mudlibs/blob/main/libs/xsfyssjb/NOTES.md

## Run natively with FluffOS

1. Build a current FluffOS driver from https://github.com/fluffos/fluffos
   (native `build` / `build-debug`; see that repo's docs).
2. Download and unzip `xsfyssjb.zip` from the URL above (or clone
   `https://github.com/fluffos/mudlibs` and use `libs/xsfyssjb/`).
3. From the unzipped lib directory, ensure `config.fluffos` points
   `mudlib directory` at this tree (the checked-in file may contain a
   maintainer-local absolute path — edit it to your extract path).
4. Start the driver:

```bash
/path/to/fluffos/build/src/driver config.fluffos
```

5. Connect a UTF-8 MUD client to `127.0.0.1:40149`.

- Admin / wizard login: `fluffos` (password documented in README)
- If you host this on a public network, change the published default
  admin password before opening the port.

## Machine-readable catalog

- Site-wide catalog: https://mudlibs.fluffos.info/games.json
- Site-wide LLM overview: https://mudlibs.fluffos.info/llms.txt
- This file: https://mudlibs.fluffos.info/xsfyssjb/llms.txt