Don't Mess with Nine Thousand Years Old

Did Alexander take the wrong path in his expedition? Was it because of Xiang Shaolong that Qin Shihuang burned books and harassed scholars, or was he instigated by others? Why did Liu Bang's teacher only teach him to act rogue? Who stole Lu Bu's body outside the Baimen Tower? Who led Guan Yu and Zhao Yun from ordinary people to the path of legendary generals? Who erased the names of two peerless masters, Wang Yue and Tong Yuan, from history? There is an immortal named Nanhua. Is he a woman or a man? Outside Luoyang City, a blue police phone box always appears inexplicably? Doctor Who's best friend is actually Chinese? Who are those men that time travelers never want to meet in this life? ... All these mysteries are related to a guy named Cheng Nan.