On the other side, as you said that China claimed Nine Dash from 1948. We "suppose" those islands are all belongs to Vietnam. China took them and claimed the sovereignty in 1948, so where was the sound from Vietnam at that time? Where was Ho Chi Minh's sound that those islands are belongs to Vietnam? For example, I took your 1 dollar Money and announced to all over the World these are my Money! And you just standed beside me but said nothing at that time! After 60 yrs, suddenly, you told me that I must pay back that 1 dollar to you because it is yours(the fact is that 1 dollar has history now and has become 1000 dollar or more). This is the situation now.
Your argument is very funny.
Nine dash map made by some KMT officials in Chongqing in 1947. When Vietnam was controlled again by France Army. You can not illegally draw up my land in to your and claimed its yours.
I again reminder you that in Franciso conference 1951 after WW II claim of China over our Islands was protested by PM Nguyen Van Huu of Vietnam Goverment, who is presented to Vietnam on Francisco Conference. So claim of China is rejected by voting.