Which one should I pick for a new project?

That depends entirely on your project goals—these are fundamentally different repositories:

wuye9036/cpptemplatetutorial is an educational resource, not a project template. It's a Chinese-language guide to C++ template metaprogramming, teaching templates as a Turing-complete language. The repository contains documentation (README.md) and example code (like [QuickSort.cpp]) demonstrating advanced template techniques. It's designed for learning, not for serving as a starter codebase.

yuesong-feng/30daymakecppserver is a tutorial series with incremental code examples for building a Linux C++ server. Each day has compilable server and client code you can run. The README states [lines 59-66] it's incomplete and outdated ("学生时代初学C++的历程, 工作后已无精力写完"), though a community fork exists at Wlgls/30daysCppWebServer for continuation.

Choose based on your needs:

• If building a network server: Start with 30daymakecppserver to understand epoll-based event-driven architecture, then graduate to production libraries like muduo (mentioned in the README).
• If learning C++ templates & metaprogramming: Use cpptemplatetutorial to understand how templates work as a language; it complements the reference book "C++ Templates" [lines 68-79].
• If neither applies: You'll need a different starting point entirely.

What type of project are you planning?

FOLLOW_UPS:

• Are you building a network service or application?
• Do you need to understand template metaprogramming fundamentals?
• Should I explain 30daymakecppserver's architecture in detail?