Will China help Iran build a new air force?

The Islamic Republic of Iran Air Force (IRIAF) was conspicuously absent during the unprecedented 12-day June war with Israel.
Its fighter jets are so antiquated that, with a few exceptions, the Israeli Air Force largely left them alone.
With another round of hostilities seemingly inevitable, and having waited in vain for Su-35 Flanker fighters it ordered from Russia years ago, the question of whether Iran will turn to China to modernise its air force is arguably more relevant than ever.