The people of You Ying wanted Huang Donglai to survive, so they couldn't administer a lethal poison to him.
At the same table, four people were drinking tea; they had to use a single pot of tea to let one live and kill three... Such a technique of poisoning might be possible for the Huang Sect, but as for You Ying, even Gu Qiying himself couldn't accomplish it.
Therefore, the tea served to Huang Donglai and the others in the kitchen of the tea house was a "life-saving medicine," not a "deadly poison."
Of course, they understood that it wouldn't be easy to use the medicine to control these individuals.
Not to mention someone like Huang Donglai, who belonged to a top Martial Arts family proficient in poisoning, but even Ran Ling was not easy to fool.
Thus, the people of You Ying used a quite sophisticated secret poison—"Morning Dew."
