"Hmm!"

Zhu Youxiao took a look and opened it carefully. The thing is simple, it's about shipbuilding. Although the steel keel was not successfully developed, the clipper gunboat was optimized, and the whole size was reduced, so that a minimum of 2,000 materials could carry cannons. Although there are 10 fewer doors overall, and only 50 can be carried, it is more practical. After all, now that the shipyard is newly opened, it is a bit difficult to get a larger ship type.

In addition, after Nanzhili put down the rebellion, he copied a lot of good shipbuilding timber from the south that could be used immediately, so Yu Zhigao ......