Who is credited for building the Great Wall of China

Qin Shi Huang the first emperor of China initiated the Great Wall's construction in the 3rd century BC to protect against invasions. Wang Tou Fa Hien and Hiung Tsang were travelers or officials not builders. The wall spans thousands of kilometers symbolizing Chinese engineering and history. It was built by millions of workers over centuries. The Great Wall is a UNESCO site and tourist attraction providing lessons in ancient defense strategies and labor history.