In the world of body tempering techniques, it was not bad to be able to condense 2,500 kilograms of physical strength at the Essence Energy Cultivation Realm.
4,000 kilograms was considered a high-grade body-tempering technique.
Most of the people with more than 4,000 kilograms of strength had already entered the Qi Condensation Realm.
To most cultivators, there was not much difference between 1,500 or 2,500 kilograms of physical strength.
Instead of spending the world to condense one's physical strength, it was better to spend resources and time to increase one's spiritual energy cultivation.
Upon reaching the Qi Condensation Realm, the spiritual energy circulating inside would have a strength of 10,000 to 15,000 kilograms.
However, for blacksmiths, physical strength was very important.
This was because forging a weapon might take several days.
One's spiritual energy cultivation was often insufficient to sustain that.