This repository is a static archive of programming tutorials scraped from the Chinese tutorial website runoob.com. It contains a single Python 2 script (`download_tutorials.py`) that downloads HTML pages and converts them into offline files, along with the scraped output: a directory of HTML files and PDFs covering over 60 topics (e.g., Python, Java, HTML, CSS). The project is primarily a web scraping and offline learning resource. The scraper uses `urllib2`, `lxml` XPath, and gzip decompression, but it is fragile due to hardcoded site selectors and is only compatible with Python 2. The downloaded HTML files appear incomplete (many contain only `</html>`), suggesting the scraper was broken or the repo was committed mid-run. The frontend assets (CSS, JS) are verbatim copies from the source site. No tests, no CI, no recent maintenance. The project serves as a snapshot of a now-outdated site structure and is not suitable for reuse without significant modernization.