He already answered your question, why not do some research? The Chinese has always been pain in the azz and opportunist whenever in time Vietnam in civil war or unstable political. In 981, they back up the Cham to provoke Dai Viet, twhile Dai Viet political unstable, and sent invading force shortly after. Le Hoan out smart them by defeat them and turn to sack Cham kingdom.
During Later Le, they back up Tai and the Cham again to weaken Dai Viet. Le Thanh Tong thus sent massive army to put an end to Cham threat and pushed his Army west ward to destroy the Tai and reach to Myanmar only to turn his Army back to guard the capital from Chinese.
History repeat itself in 79 when the new unified Vietnam faced to front war with Chinese in the north and Khmer in the South West.
Thats why Chinese cannot be trust among Viet. How China big? Because they cunning take advantage when near by nation weak to sieze territories. Speaking of bravery they are not any to compare with Japanese. That s why during Japanese invasion despite massive population they still lose for Japanese.
Le Duan north Vietnam when visit China he commented, I dont see a single guerilla fighter here, during Japanese occupation , this is not like us we grow up in wars, every person can fight.
If you just focus on war, the history is not complete. It's just one side of history. Even the so-called peaceful Switzrland had dozens of wars in history with neighbors. I am really very sad, due to today's disputes, you consider the all long history as Vietnam-China conflicts. China didn't invade Laos, Thailand, why just pay attention to Vietnam? The one-side history would make your expression incredity.
"The Chinese has always been pain in the azz and opportunist whenever in time Vietnam in civil war or unstable political."
This is really complicated. The legal Vietnam govt asked China to help to fight riot or rebellion, should we help or not? Take another example, in 1590's China by Korean requests help to defeat the Japanese invasion. Yes, China failed to protect Korea in 1894, but at least Korean admit we helped them in 1590's.
I know it's a great regret China lost the ability to protect Vietnamese from European colony. This incident almost broke all ties between an ancient Vietnam and today's Vietnam. But it's just Vietnamese themself who can mend the history and rebuild confidence.
"How China big? Because they cunning take advantage when near by nation weak to sieze territories. Speaking of bravery they are not any to compare with Japanese. That s why during Japanese invasion despite massive population they still lose for Japanese."
How China big? This is power of culure. In a region( where ever), in the beginning of human society, when you firstly created writing language, culture system, govt system, education system, values and army, it will firstly effectly absorb around groups. I don't say cultures have better or worse order, I mean early and later on stage. If Vietnam in the region firstly created everything, maybe I am Vietnamese nowadays.
"Le Duan north Vietnam when visit China he commented, I dont see a single guerilla fighter here, during Japanese occupation , this is not like us we grow up in wars, every person can fight."
I know Vietnamese are heros, tough guy, as well as friendly, the world all know that. We know how you defeat French in Dienbien Phu and fulfil unification in 1975. But I really don't know what Vietnamese really want to show to Chinese. Make us admit Vietnam is more strong than China? Make us admit Vietnamese harmed by Chinese? Laugh at us which we were weak in 19th century or once occupied by Mongolian? Or just have to consider China as enemy? I don't know what you guys want. I always have positive opinions on Viet guys, but it really make me embarrassed when you consider me as enemy.
"History repeat itself in 79 when the new unified Vietnam faced to front war with Chinese in the north and Khmer in the South West."
About this thing, I ever talked with an Viet poster. Khmer, China-Vietnam 79 were two things. After Vienam unified, China and Vietnam govt had made agreement, we both treat Vietnamese (living in China), Chinese(living in Vietnam) peacefully and equally, giving them nationality if they want. China till today keep the promise, we treat Vietnamese minority well; while Vietnam in 1977 expelled Chinese there because of nationalization of economy. China govt warnned 2 times, Vietnam ignored all warning. Chinese living in Vietnam were not your enemy, they help Viets to defeat French, support Vietnam unification.
I just hope you could calm down. The disputes will be finished oneday peacefully,like done on land border. You make a conclusion that Chinese are your enemy in all history, you just always fell in dilemma. I respect Vietnamese, and
Tet Doan ngo is coming, have fun during the festival.