Xu Fan had roamed the Cultivation World for thousands of years, amassing countless treasures and oddities in his lifetime.
Although most of these treasures were destroyed in the heavenly tribulation or left behind in the Cultivation World after his failed Tribulation Transcendence and subsequent death, his soul memory remained largely intact. The experiences of his cultivation path, and numerous techniques and secret methods, were all deeply imprinted in the depths of his soul.
Thus, in Sea Blue Star, a planet scarce in Spiritual Energy without even a single Cultivator and only Ancient Martial Artists with an extremely backward cultivation system, the techniques he casually gave away were of extremely high grade and immensely precious.
Using techniques as a means of trade was bound to be advantageous, and he would suffer no loss in the process.
Of course, Qian Zongsheng was naturally unaware of Xu Fan's background.