Chinese President Xi Jinping touched down in Egypt on Tuesday, the second stop in a potentially busy month of travel that will probably conclude with a White House meeting. “Once you drink from the Nile, you are destined to return,” the Chinese leader said on arrival at Cairo International Airport. Xi is likely to sign economic agreements with Egyptian President Abdel Fattah el-Sisi on Wednesday as part of his first trip in a decade to the most-populous Arab nation and his first Middle East stop...