translation.en: It's very complicated to test the new material for the building, but this is much stronger than I expected, and also it's very easy to waterproof, and also, because it's industrial material, it's also possible to fireproof.
translation.zh: 测试新的建筑材料过程很复杂， 但纸管比我想象的要坚实许多， 而且进行防水处理也很容易， 加上纸是工业材料，所以 进行防火处理也是可能的，