In order to elevate his physique to the level of the supreme body, Long Fei has already paid a great price, and even a force like Qingqiu doesn't have enough resources to provide for further enhancement.
In the world of Hongmeng.
If we talk about which cultivation method is the hardest and requires the most resources, it is definitely the body cultivation.
Especially the supreme body.
To continue to enhance it, at the very least, it's a supreme-level treasure, yet even a supreme-level spiritual medicine from Hongmeng has very limited enhancement on a supreme body, considering the endurance of the physique.
The enhancement of the physique is even harder.
Unless you have a ruler backing you, who could obtain so many peak supreme medicines to enhance the physique? Moreover, if these medicines are consumed to enhance cultivation, the improvement would be much greater.
Therefore.
