 From the sentence "How can you mix with foreigners without learning foreign words, How can you be counted amongst the Han without learning Han words" (不學番言，則豈和番人之眾；不會漢語，則豈入漢人之數) it is clear that the book aimed to facilitate the Tanguts and the Chinese to learn each other's languages.The book contains words 414 CPC, according to three powers are divided into nine categories