wtf is qtkaifajingyan?

qtkaifajingyan is a Chinese-language collection of practical tips accumulated by a developer over more than ten years of building applications with Qt, a cross-platform software framework used to create desktop and mobile apps. The repository reads more like a personal reference book than a traditional project: it is a numbered list of lessons, tricks, and workarounds that the author found useful and wanted to preserve. The tips cover a wide range of Qt topics: how to speed up compilation by enabling multi-core builds in QtCreator, how to use timers to avoid blocking the main interface during slow startup operations, how to retrieve the properties and methods of any widget at runtime, how to embed one widget inside another (for example, adding a search button inside a text field), how to set application version numbers and icons via the project file, and how to handle style changes on controls properly. Many tips include short code snippets in C++ to illustrate the point directly. Beyond the tips list, the author also links to related commercial products, including a video monitoring system, a large-screen display system, and an IoT management system, all built with Qt. Downloads and online documentation for those products are available on external sites. Source code for some projects is sold through a Taobao shop. The repository is written entirely in Simplified Chinese and is aimed at Chinese-speaking Qt developers at all levels, from beginners to those doing advanced work. It also links to the author's Bilibili video channel (a Chinese video platform) and a WeChat public account where more tutorials are shared. The full README is longer than what was shown.