fuckiens ran road to vietnam when mongols invaded song china.
https://en.m.wikipedia.org/wiki/Mongol_conquest_of_China
Chinese Resistance in Vietnam against the Mongols
The ancestors of the Trần clan originated from the province of
Fujian and later migrated to Đại Việt under Trần Kinh 陳京 (Chén Jīng), the ancestor of the Trần clan. Their descendants, the later rulers of Đại Việt who were of mixed-blooded descent later established the
Tran dynasty, which ruled Vietnam (Đại Việt). Despite many intermarriages between the Trần and several royal members of the Lý dynasty alongside members of their royal court as in the case of Trần Lý
[107][108] and
Trần Thừa,
[109] some of the mixed-blooded descendants of the Trần dynasty and certain members of the clan were still capable of speaking Chinese such as when a
Yuan dynasty envoy had a meeting with the Chinese-speaking Trần prince Trần Quốc Tuấn in 1282.
[110][111][112][113][114][115][116]
Professor Liam Kelley noted that people from Song dynasty China like Zhao Zhong and Xu Zongdao fled to Tran dynasty ruled Vietnam after the Mongol invasion of the Song and they helped the Tran fight against the Mongol invasion. The ancestors of the Tran clan originated from the modern day province of Fujian as did the Daoist cleric Xu Zongdao who recorded the Mongol invasion and referred to them as "Northern bandits". He quoted the
Đại Việt Sử Ký Toàn Thư which said “When the Song [Dynasty] was lost, its people came to us. Nhật Duật took them in. There was Zhao Zhong who served as his personal guard. Therefore, among the accomplishments in defeating the Yuan [i.e., Mongols], Nhật Duật had the most.”
[117][118] The Tran defeated the
Mongol invasions of Vietnam.
Southern Song Chinese military officers and civilian officials left to overseas countries, went to Vietnam and intermarried with the Vietnamese ruling elite and went to Champa to serve the government there as recorded by Zheng Sixiao.
[119] Southern Song soldiers were part of the Vietnamese army prepared by emperor
Trần Thánh Tông against the second Mongol invasion.
[120]