The real understanding of the cultural differences is an inevitable precondition and the cultural information interaction in cross-cultural communication has its realistic meaning on forming and developing our own cultural concept and cultural indusry.

On Skopostheory from the typology of intertextuality and cultural intertextuality

Based on the model proposed by Hatim & Mason, a new subclass of intertextuality—"cultural intertextuality" is added.

In the past, Lianzhou and Qinzhou of China had close cultural interaction with North Vietnam, which included the land and sea transportation between Lianzhou, Qinzhou of China and the northern part of Vietnam, the two-way migration between the two sides, the assumption of official posts of Lianzhou and Qinzhou natives in North Vietnam.

On the basis of inheriting the cultural tradition of early Qin Period,the three cultures surmount their own cultural boundaries and engage themselves in cultural interaction and their interaction and integration is the most splendid and ef.

Then on the basis of the reconsidering the cross-cultural communication and analyzing the role of home culture in foreign culture learning and the elements of the communicative competence,the author suggests that cultural interaction between foreign culture and home culture is the chief way to help learners forest the practical cross-cultural communicative competence.