Han Xingxian (Li Zhengzai) moved to a small villa by the sea. He gave the house an Italian name "Il Mare", which means "sea". While cleaning up the house, he found a strange letter in the mailbox, which said, "I was the last tenant before you moved here." If you receive my letter, please post it. " What's more strange is that the mailing date of this letter is 1999, which is two years later-and the current time of Xingxian is 1997. Xingxian immediately wrote back to this puzzling person and asked what was going on.