The Core Formation stage cultivator with the surname Qi initially had no desire to promote Fang Jinyu's alchemical abilities. It was just that he stated in front of everyone in Mount Tianling that Fang Jinyu was not suspicious. The basis for that was that Fang Jinyu was good at refining Core Spirit Elixirs.
The basic version of Core Spirit Elixirs was worth more than 10000 spirit stones.
Not to mention the enhanced Core Spirit Elixirs! Fang Jinyu could purchase a decent middle-grade spirit tool by only selling one elixir!
However, Fang Jinyu had already refined four of these elixirs.
Fang Jinyu didn't put the first batch of elixirs into the "mystery realm." He had only placed them in the Hundred-Treasure Box. Hence, it naturally couldn't hide from a Core Formation stage cultivator's divine sense.