Enigma05:
Everything is plausible at this point lol. We’ve as usual got more questions then answers so I hope things start moving in the answers direction now.
We know that so far, Wufeng never instructed the killing of SW and his son. We also know Wufeng fears GSJ due to his reputation in the jiang hu.
We also know that GSJ was fooled by the Zheng family in Episode 2 which made Gong Hong Yu suspicious of GSJ and asked him to investigate the Zheng family. GZY succeeded the SW position in the absence of GSJ.
We also know that Gong Huan Yu visited Miss Zheng in Episode 1 after she was captured. GYZ was surprised to have found out someone had visited Miss Zheng. GHY also gave her a cup of the poisoned wine to drink. But, she didn't die from the poison. However, the poison burned her skin.
When they inspected the body of Miss Zheng, they didn't find the poison in her body but only on her skin.