have already proved it would be futile for vietnam to unreasonably and illegally interfere and jeopardize the work of chinese fishing boats and eventually vietnam is damaging its own interests by doing this. >> more now from adrian brown who is in beijing. >> reporter: this is a reminder tensions between vietnam and china are not going a way, in this latest incident there are different versions of what happened. china says a vietnamese fishing vessel bumped into one of itses are vessels and capsized and sink and they said they that attacked it and caused it to sink. this happened in a place where they are drilling for oil on lands that are claimed by china and vietnam and this began at the beginning of the month and they protect the drilling