As for the "wonder drug" meant for Golden Core cultivators, Su Hao had seen it before in the list of medicines Ashan had uploaded. It was likely a byproduct of Ashan's research into Spirit Power Enhancement Drugs.
Since Feng Yan needed it, Su Hao did not mind satisfying her request.
As for what Feng Hua thought...
One was his sister, the other his grandmaster. Naturally, Su Hao stood by his sister.
However, although the medicine had been given to her, whether Feng Yan could successfully administer it was another matter.
By Su Hao's estimate, even with the medicine, Feng Yan would not have many chances to slip it to Feng Hua. It was clear that Feng Hua was somewhat wary of her...
Could it be that Feng Yan had done this sort of thing before?
Su Hao handed Feng Yan a small square stone. "Test out a little gadget I just made. It's called Ten Thousand Miles Sound."
Feng Yan took it and turned it over in her hand. The stone was square and gray all over, with two buttons on it—one round, one triangular. She could not help asking curiously, "What Ten Thousand Miles Sound?"
Su Hao said, "It means voices can travel across ten thousand miles. Later, press the triangular button to activate Ten Thousand Miles Sound. Once you hear the 'beep beep' sound, press the round button, and you can talk to me!"
Feng Yan asked, "Press it now?"
Su Hao said, "Either way is fine."
Then he flew an enormous distance out over the sea. Once they could no longer see one another, Su Hao pressed the triangular button, activating the Spirit Power within, then pressed the round button.
The next moment, the small stone in his hand rang out with a "ding ding ding."
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