I used the Mo Dao (a type of long-handled sword) to fight the Japanese.

A history student from Zhongzhou University accidentally falls into a cave during an internship in his hometown and is transported back to 1938. He is captured by the Japanese and forced into hard labor at an iron mine! He tries every possible way to escape, using his historical knowledge to create ancient weapons such as the Mo Dao (陌刀), crossbows, and "Yiwofeng" (一窝蜂) to fight the Japanese. He uses his wit and courage to protect the villagers, ensuring they live a peaceful and happy life…