the unitedthe rules, states is signaling to vietnam and the world that there is an importance in engaging him further. rishaad: the thing is, let's have a look at the timing. why is this happening now? we have seen the tensions in the south china sea. reporter: exactly. the meeting between the two countries between the officials is occurring 20 years after the two countries reengaged diplomatic relations, and it underscores the converting inches -- converging interests of the country's, at a time when china is increasing assertiveness in the south china sea. just a year ago, china placed an oil rig off the coast of --tnam, that trickled triggered a diplomatic row between the countries. china as well as constructing artificial islands which is upsetting vietnam and other countries. vietnam views this as a threat it'se economy and sovereignty. have one of the largest shipping lanes in the world. you will see more and more engagement. time, both countries are involved in negotiations with the transpacific partnership treaty. so they view the future as being a much more economically engaged.