Raymond Ardin:
Yes I get what you mean now. What you said before made it seem like he was evil and necessarily associated with Wufeng just because he took the herb. Whereas it's normally meant to help break through to the next level in martial arts. Anyways, at this point we don't actually know when he took it; like, was it long before he "died," or was it around the same time.
GHY is said to be evil. In Episode 2, his father regretted his decision on electing him to be the next heir. He heard about the conversation and rushed into the room to interrupt his father with the news about the identity of the Wufeng spy, Miss Zheng.
We also know that the last message Wufeng received from Anonymous about the bride selection was 22 years ago which was around the time GZY's mother entered the Gong residence.
We also know that Yun Que was the only Wufeng spy who entered the Gong residence and returned alive but died from the Flies poison.
We also know that Master Yue was the one who hid Yun Que and visited Miss Zheng.
Was Yun Que GSJ's assistant during the trial? Is that why SGQ targetted him because Wufeng knew GSJ was a kind man?
GZY is beginning to warm up his impression on GSJ.
Wufeng spies are trying hard to divide GSJ/ GYZ from GZY.
Although Wufeng is said not to be aware of the Infinite Heat, Lady Wuji and SGQ happened to know about it. That's why SGQ was calm when she heard about the Infinite Heat.