"At present, we have overcome the technical difficulties of man-made fibers, plastics, and synthetic rubber, and we can already carry out mass production."

Xiao Ming introduced with some excitement, and led Zhou Xian to the front of these materials as he spoke.

"It's wonderful! Xiao Ming, you have done a great deed for the people of Da Zhou. ”

Zhou Xianyan was also excited, with these three things, the development of the Great Zhou Dynasty can be pushed forward for dozens of hundreds of years.

"Da Ming: Spoilers at the beginning Chongzhen, reviving the rivers and mountains" Chapter 275 Da Zhou's tools to make money are being hit by hand, please wait a moment,

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