As said above: China

"Many times, the amount called for military air support, but the Chinese general staff refused that request artillery lean on." (Xiaoming Zhang)
2 / TQ does not take Air Force combat, because to consider when confronted with Non Forces - Air Force VN. Especially for Non-VN, at that time was regarded as a strong, well-organized, experienced combat.
Vietnam also owns the socialist aircraft plus aircraft from American booty, including trolling around ground-attack aircraft A-37 and UH-1H helicopters modern, flexible, specialized raiding and cover the troops; Can anti-tank missile. If VN put on combat aircraft: Irreversible block progress of China, but it certainly will not be less damaging to the Chinese tanks and infantry, reduce our casualties.
As said above: China's strategic intentions and do not want to VN war escalated comprehensive. trolling around However, it is difficult to understand the VN have superior capabilities and limited scope fighting on its territory. Why not give VN combatants is not yet fully decoded, is there an implicit commitment on this incident between the two countries' trolling around leaders at that time?
"... Beijing is also the possibility of air combat. PLA Air Force will commit and 6 using 18 regiments to reinforce the squadron prepared to support the ground campaign. To avoid escalation conflict, trolling around the Central Military Commission ordered trolling around the air force combat support only within the territory of China, meanwhile, ordered military units not ready for close support of ground operations "if trolling around necessary", although not the official definition given situation and what should never be regarded as "necessary." mandate stipulates that any campaign outside Chinese airspace must be permitted by the Central Military Commission. trolling around Based on the This principle, a strategy requires military units are not willing to fight to protect trolling around the airspace and ground support. trolling around When the ground campaign began, at the same time the Air Force was ordered to produce high-frequency stimulus airspace over the border to prevent Vietnam air combat. staff operating control and aviation as well as the combat team commander trolling around has been appointed to head Central Command area of two soldiers in Guangzhou and Kunming Minh, the commander of Air Force units and some ground handling unit will also participate in the strike mission ...
In transition PLA into a modern force in the 1980s, few attempts were made to correct errors in military thinking, which is always overlooked attitudes of the role of non- military. As a result, if something was not honest in the withdrawal of the PLA experience, it is a lesson on air superiority or air support. Documentation of the PLA maintains that limiting the ability of the Chinese air force is the main reason why the Air Force was not involved in the Vietnam conflict. Marshal Ye Jianying (Ye Jianying) even commented that ridiculously fake activities of the Chinese Air Force in the war against Vietnam was a "diversionary moves deftly in air combat". That comment clearly shows still mistakes in the Chinese trolling around leadership as they continue not evaluate the role of the Air Force importance in modern warfare trolling around ... " trolling around
Speaking trolling around political reasons, China wants to prove the widespread not want war. But, considering the technical aspects, the real reason is not the fighting force of the Chinese military is very weak at this point, the Air Force 1 margin trolling around Vietnam can also be a headache for China.
In one report sent Central Military Commission of Air Force commander General Truong Dinh Phat, stating: "December 27, 1977, I-Truong Dinh Phat please trolling around report to the vice president of Deng Xiaoping, commissioned military members Central to the number of accidents and technical problems in half the flight training period in 1977 .. "
".... From 1968 to 1971, within 4 years, recruited pilots working for more than ten thousand people, but has lower entry requirements, after taking into coaching, many places have voluntarily reduced the number trolling around quality curriculum and practice time, due to lack of equipment. "
"2 years 1968va 1969, pilots are trained only one week to learn the basic knowledge they were boarding practice, the primary trainer and fighter aircraft were half years that has been put on the payroll Air Force. " "So trolling around little flight time, to reduce the number of textbooks, grades muc.Cac simple high-level category fly less and less, very few conduct liaison aircraft and other complex items, leading trolling around to the submission of the pilot's flying very low. "
"Speaking of flying quality, the cause of the incident including flight problems: low quality aircraft, have lost both aircraft crashed while flying components, with the engine stopped, the flight operations, aircraft artillery gun on sudden explosion, even ....