The Mastermind

"Oh, I suddenly remembered it again!"
Uncle Fu laughed on the other end of the phone and said, "Don't feel wronged. No one knows about this except a few people including me."
"The man you are talking about is indeed from Xihai. He was the most influential person in Xihai 20 years ago. He was nicknamed Old Bat because of his excellent Qinggong skills."
"But then, for some unknown reason, he suddenly disappeared without a trace, and no one knew where he was."
"But just last year, when...