I checked the map, wow, the 3 giant reclaimed lands that can host airfield form a perfect triangle; subi reef(North), fiery cross reef(West) and mischief reef(East). And each of them is 120 to 150 miles apart.
"The Golden Triangle"??
I guess 3 airfields to reinforce each on in case under attack and hold the fort & wait for reinforcement from mainland.
The construction has been astounding. I wonder when they're going to be putting some actual defences on the island tho. Like anti-ship and anti-air missiles. That strategy worked wonderfully for the Russians in Crimea.