Lin Mu's current strength was enough for him to lift a hundred kilograms easily, with no effort. And if he used vital energy and spirit qi to amplify his strength simultaneously, it wouldn't be a problem for him to lift a thousand kilograms as well.
Still, when using a weapon this weight became a completely different factor. While weight was an important factor and was quite beneficial for certain weapons such as hammers and maces, it was a different story in the case of weapons that worked more on technique such as swords and spears.
Here more weight did not mean that the weapon would be that much more powerful. In fact, a heavier weight may even restrict the user's full potential in using the weapon. Thus it was important for the weapon to be well balanced.
