梁书
The "Book of Liang" records the arrival in 226 of a merchant from the Roman Empire (Daqin) at Jiaozhi (Chinese-controlled northern Vietnam). The Prefect of Jiaozhou sent him to the court of Sun Quan in Nanjing. Sun Quan requested that he provide him with a report on his native country and its people. An expedition was mounted to return the merchant along with 10 female and 10 male "blackish coloured dwarfs" he had requested as a curiosity and a Chinese officer who, unfortunately, died en route.