After hearing about the 'grave of True Monarch Fifth Cultivator of True Virtue' and meeting the jade white lion Fourth Cultivator of True Virtue, Song Shuhang already suspected that there was a relationship between Venerable Seventh Cultivator of True Virtue and Venerable Sixth Cultivator of True Virtue.
Now, he discovered that Venerable Seventh Cultivator of True Virtue was extremely familiar with the ancient grave and capable of guiding them step by step through the whole thing. Seventh Cultivator of True Virtue gave spoilers left and right during the journey... 'there is a trap here', 'there is a treasure hidden there', 'there is something over there', and so on.
It was as if someone wanted to play a single player game but was forced to watch the whole walkthrough before starting... what was the point in playing the game now that they knew everything?! It was going to be extremely boring!
Song Shuhang and the others were in a similar situation right now.
