@dyno i'll do it
https://www.amazians.com/wp-content/peepso/users/8/3222482e33-avatar-orig.jpg?lm=1596071919
The Liangzhu Culture:
https://en.wikipedia.org/wiki/Liangzhu_culture
"The type site at Liangzhu was discovered in Yuhang County, Zhejiang and initially excavated by Shi Xingeng in 1936. A 2007 analysis of the DNA recovered from human remains shows high frequencies of Haplogroup O1 in Liangzhu culture linking this culture to modern Austronesian and Tai-Kadai populations. It is believed that the Liangzhu culture or other associated subtraditions are the ancestral homeland of Austronesian speakers."
Video Discussion:
SapphireSky gave the source that proves Austronesians and Vietnamese has a same ancestor
https://www.amazians.com/wp-content/peepso/users/8/3222482e33-avatar-orig.jpg?lm=1596071919
Before south china sea, there was champa sea
@james Vietnamese call it the south sea or the East Sea. China is not part of the name.
@athena south of who? The name should after the origins of the people that explored the oceans before everyone.