Luo Yu suddenly lost those charming thoughts in his heart, but was seriously thinking about what he should do when the foreign enemy invaded?

The method of making a city wall out of cement that Lin Jinfeng gave him last time was really good, he had tried it many times, and the wall made of cement was indeed extremely hard.

However, the climate of the Central Plains is mild, with four distinct seasons, and there is no particularly wet or cold weather.

If they are built to the frontier, it is another situation, this has not been tested by the other side, and it is not possible to make a decision now, but Luo Yu has regarded this cement wall as a magic weapon in his heart.

He had a hunch that in the near future, this cement wall would definitely change history.

Maybe it's a whole thing

"True Fragrance System: Being a Dead Girl is a Villain" Chapter 212 The Sweetness of Meeting is in the middle of the hand, please wait a while,

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