Happen to see one article in other forum, talked some thing about the Indochina war. Here are some statistics:
1. In VN. French war, China was the only one to support VN. Totally give VN all kind of guns 116000pcs, artilleries all kinds total 4630sets, China sent total 320000 men into VN.
2. Zhou enlai visited Hanoi Oct1964, agreed if USA not across the 17 degree line, China send troop into VN only for anti air operations, if USA across 17 degree north altitude line, China will have a Korea style war with them. On 9th Jun1965, the first group PLA was sent into VN. China sent this message to USA through UK, to advice where the bottom line was. China side, 2153 air battles were fought, suffered 1100death, 4200 injury. China volunteer arm built new rail way in VN 117km, and rebuilt old track 363km, also sent into VN Chinese communication, logistic, road building ,land mime clearing troops. Total material sent to VN USD20 Billion(at that time). China troops all return back to China in July 1970.
3. At begin of the was, Chairman Mao want to export communism to all SEA countries, want to "liberate all the depressed people", firmly oppose VN negotiate with UAS. Latter, after Nixon visited China, China then advised VN to stop the war. China want to cooperate with USA,but VN want to united the South, problems begin.
4. after China and Soviet broke up, China wished VN not to get too close to the Soviet, but due to historical and many reasons, VN actually prefer Soviet than China, showed a double- face, with China. for example, any discussions between China and VN, Cambodia and Lao leaders, the Soviet get a detailed report. Now Russ have 77 records of such summit discussions already deciphered.
5. Mao had the main influence over the VN and China relation ship, when his ideology changed, would change the relation. But Deng Xiaoping always disliked Vietcong since the beginning. Mao was right, Deng was a Capitalists hide in the communists, he eventually went to the USA. Communism finished by him.
6. VN the only winner of the war, China, Soviet and USA all losers.