If Dongfang Hongyue could achieve godhood, Lin Yun would also be very happy for her.
The lifespan of mortals is at most a thousand years, but after becoming a god, their lifespan becomes almost infinite.
As long as they are not killed, they will not die.
Divine Spirits have countless ways to extend their lifespans, and neither their physical bodies nor Divine Souls would limit the lifespan of Divine Spirits. If really due to some stroke of fate, they don't find a method to prolong life, their basic lifespan is still hundreds of times longer than that of mortals.
Mortals, on the other hand, are different.
Even if cultivating immortality, the physical body has already broken through some sort of limit, but there will still be another limit; when old, both the Divine Soul and the physical body will deteriorate and then perish.