Jiang He might have transmigrated to a world of Qi and martial arts, but the System that he got only provided him with... seeds. 
"Hold on, System. Aren't these just... peas? Not only are they inedible, but I'm supposed to throw them far, far away?" 

Everybody is Kung Fu Fighting, While I Started a Farm

Who do you think you are belittling?

Some of the Heavenly Immortals were upset inwardly. Even so, when they remembered the Thunderflame Sword Qi that seemed to overflowed across the world just now…

They did not even dare to say a word.

On the other hand, Lü Dongbin and the other peak Golden Immortals all traded glances, a look of joy showing in their eyes.

Iron Crutch Li stepped forward, laughing. "In truth, the greatest gap between us and the Hundred Races are actually our peak combat forces. However, now that you are with us, Brother Jiang He, we would have a greater confidence in defending our homeworld against their legion's assault!"

"That's right! We don't have to fear the Hundred Races with Brother Jiang He!"

Once another Golden Immortal showered his praise, the other Golden Immortals all echoed.

I’ve Been to the Black Demon Star A Few Days Ago