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

"Old Duan, what are the dogs of the Sky Demon Cult actually thinking?" Cheng Dongfeng cursed. "They're getting more active over the last two years, allying themselves with Ferals and wreaking havoc everywhere. Could they intend to occupy Lingzhou City?"

Duan Tianhe's eyes twitched and quietly said, "That's not necessarily impossible. The Sky Demon Cult might be backed by Sky Demons themselves, who are ambitious and are aiming for Earth itself. In fact, if not for certain limitations, they would have launched a major invasion."

Duan Tianhe's tone changed then and he chuckled, "As long as the champions of the Sky Demons could not descend upon us, the Sky Demon Cult would only ever be a bunch of clowns. They've only ever survived because they are in hiding—if they came out in the open, the various nations of this world would immediately greet time with a load of nukes."

You Can’t Die On Me, Jiang He