China doesn't have reinforced hangars for most of its heavy aircraft either.
Only for portion (heavy bombers), and at a significant material cost. It isn't impossible to do it for all, especially as national effort (Atlantic pens were thrown up by Germans in mere months, surely China can do better 85 years later), but this isn't something done yet.
In ME sense, lack of basing is more difficult - you have to have such strong points everywhere in the world, in sufficient numbers. Should be doable via protection money, but it changes flexibility calculus significantly.
Especially since the'll game with large aircraft will itself be substantially...larger and less affordable. Big aircraft pens aren't inconceivable and were projected since 1950s, but it was just too bothersome. It was.
