The reason Jing Yan chose to allow Gou Zhun to try the elixir was due to several considerations.
Firstly, Jing Yan had a very good impression of Gou Zhun. Back in Star Tower City, Gou Zhun and Ning Luo were the first to connect with Jing Yan. So, if a Martial Artist were to be selected from All Paths Spirit Mountain for the trial, Jing Yan would surely prioritize Gou Zhun or Ning Luo.
Aside from this impression, Gou Zhun's Sharp Gold Domain had already reached the Third Realm and was very close to the Ultimate Domain. Even without the Sharp Gold Cloud Crane Pill, with Gou Zhun's understanding, he has a great chance of mastering the Ultimate Sharp Gold Domain in the future. Of course, the amount of time required for this is uncertain; it could be tens of thousands, hundreds of thousands, or even millions of years.
The reason Jing Yan didn't let disciples who have mastered the First Realm Sharp Gold Domain try the elixir was that he wanted to take a gamble on luck.
