How to quickly upgrade the balloon recovery system level

"Metal Gear 5: Magical Pain" in the alloy equipment 5 phantom pain how to quickly upgrade the Fulton balloon recycling system? Many players don't know much about this. Don't be impatient. The following system is a series of tips and tricks for you to share with you. I hope everyone can enjoy it.
Unlimited brushing is easy for S, such as the road of heroes, with a sniper rifle, then go out for a shot, leave, and then leave the gun, brush up the hero value. Then the full map enemy attribute is B start, A + a lot, and soon can meet the research and development requirements. It is the only way to quickly satisfy this. Because the platform construction in the early stage is slow and the personnel limit is low, it is necessary to require all employees to develop more than B, and it is possible to meet the R&D level requirements.