The phenomenon that language transfer turns into language attrition is seldom concerned by language researchers. From the perspective of theoretical comparison, the two are not the same in the carrier, influencing factors, intergenerational relations and existing form, which is one of the reasons for less attention. In a more than two-year follow-up survey of a subject who has lived in Korea for more than ten years, it is found that the word "Yushun" has successfully replaced the word "Yuxu" (word order) from the subject's mental lexicon, and repeated regression reminders have been made in the study, but the word "yuxu" still shows no sign of regression. To be sure, we can guess and even have reason to believe that if the subject return to their native language environment for a long time in the future, the word "Yuxu" can still regression to their mental lexicon. But unfortunately，in more than two years' follow-up survey, only one case of language transfer transformed into language attrition was found from a large number of corpus. In other words, it is not easy to capture the phenomenon that language transfer turns into language attrition.

Abstract
I. Corpus analysis
    Corpus 1, 2.
    Corpus 3.
    Corpus 4.
    Corpus 5.
    Corpus 6.
    Corpus 7.
    Corpus 8.
II. Discussion on the relationship between language attrition andlanguage transfer
III. Conclusion
References

• LI XUESONG(Gengdan Institute of Beijing University of Technology)