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C304

Before coming out, Chen Shouxin did some gunpowder experiments. The results of their research were indeed much better than what they had done previously, but they were still far off.

If you want to be a normal firecracker, that's fine. You just want to listen to the sound of the firecrackers. Now, as long as the gunpowder was wrapped tightly, there would be no problem.

However

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