Chapter 620: The Empire has made its move against the First War Zone.

The production location needs to have several attributes at the same time: it needs to have a certain degree of confidentiality and cover, and it also needs to be close to the steel plant and able to obtain sufficient production resources.

Zhang Xian decided to carry this out personally.

A secluded valley, surrounded by layers of dense tropical rainforest, was chosen as the birthplace of the tank production line.