What is the truth of listening to thunder in Nanpai uncle's grave robbery notes series?

The truth of listening to thunder in the original book is that his uncle wanted Wu Xie to cure his lung disease by listening to thunder, so he designed Wu Xie to take the initiative to participate in listening to thunder. It's a pity that Wu Xie wanted to know his uncle's secret when he was listening to Lei, so his lung disease was not cured. Listening to thunder can actually be called Wu Xie's healing journey. Everyone knows that Wu Xie is ill, but Wu Xie doesn't know. His uncle sent a short message at that time, which put Wu Xie on the road of listening to Lei.

Listen to the truth of thunder

Anyone who has read the original works knows that his uncle didn't fill the hole when he started writing, and many plots are about his stupidity. For example, Liu's funeral was written by his uncle at the back, and Liu's funeral didn't know where it went.

Even Bai Haotian, who appeared behind, wrote that others were missing. The only certainty is that Wu Xie finally succeeded in listening to the thunder.

Listen to the thunder, you can hear the secret from the thunder. This secret refers to anything you want to know. Now there is a big change in the drama version, that is, Wu Xie is now the first person to know that he is sick.

Wu Xie and others set out, and several people fell into the grave, which happened to be the tomb of the king of the South China Sea. When they entered the main tomb, they discovered a secret, that is, mother Xue Hai said that the mural refers to a map, which is Leicheng. What does Leicheng need them to explore?