91源码网 is a source-code and tutorial resource download site, positioned around “棋牌源码”, “游戏开发教程”, “资源网源码下载” and “内存教程下载”. It covers categories such as:

- 棋牌源码: 房卡棋牌, 电玩棋牌, 金币棋牌, H5棋牌

- 网站源码: BC源码, H5网站源码, 网站源码

- 游戏源码

- 棋牌视频教程 and other棋牌 tutorials

- 透视·内存挂教程

- 工具区 and forum sections

The site lists paid resources and VIP membership options. The homepage states that users should register before purchasing resources; 黄金VIP is marked as “全站资源95%免费下载” with 3 downloads per day, and 至尊永久VIP is marked as “全站98%资源免费下载” with 10 downloads per day.

Important notices from the site: resources are “纯属搬运” and the site “并不保证每个资源都是完美可用的”. Because source code is copyable, refunds are not supported for any reason. Source-code prices do not include technical support; users who need technical support or deployment should contact the site owner.

The site also states that resources are for learning and research only and should not be used for commercial or illegal purposes. It notes that access from mainland China IP addresses is prohibited, and users should check copyright, compliance and suitability before use.