***WARNING SPOILERS FOR TGCF***
Yāknow itās funny how Hua Cheng chose to be called āSan Langā, both meaning third born son and a term of endearment meant for lovers, hinting at his past and what he hopes to gain in his future, when he also kinda maintains both meanings again throughout the events of TGCF
Like we all know he does become Xie Lianās ābeloved San Langā
But I would argue he also becomes the āthird born brother San Langā in a way as well through his relationships with He Xuan and Yin Yu, two men he really doesnāt HAVE to care for since he claims his only care in the world is Xie Lian, and yet he does in his own way anyway
Yes, this man sought out He Xuan and made a deal with him so that he wouldnāt become a future threat to his beloved, but he ALSO took it a step further by helping to feed He Xuanās fish, meets up with him regularly to feed him (claiming itās to keep him in debt sure buddy) and HONORS HIS WORD not to mess with his revenge schemes during the Black Water Arc even though his beloved is horrified and wants to stop whatās happening
And with Yin Yu! Hua Cheng initially saw a banished god and saw the perfect opportunity to try and figure out how to free Xie Lian from his shackles, but Hua Cheng eventually came to TRUST Yin Yu with even his most sacred tasks in finding and caring for Xie Lian. Not to mention how itās implied after canon that Hua Cheng KEPT Yin Yuās shackle and helped him reform as a ghost after he died
He didnāt have to do any of that if what he claims is true and his only care is his beloved! And yet he did it anyway! Somewhere in that little ghost flame that cares and burns so brightly for its Dianxia, it came to care and burn just a little bit brighter for two more souls. The ONLY men that Hua Cheng ever treats as something close to an equal and confidant are those two, and he has proven again and again that when he cares, he CARES even if he denies it with his words
Also yes, Hua Cheng is WAY older than both of them physically, but one could argue that He Xuan and Yin Yu (having died/ascended then banished) as full on adults vs Hua Chengās 17, they are both MENTALLY older and therefore can be considered the older brothers to Hua Chengās āSan Langā. He trusts them with his deepest secrets, he listens to their advice (however much he tries to deny it), and he has shown again and again through his actions that he gives care to their relationships
Hua Cheng may have had two abusive, terrible brothers growing up, but he somehow managed to find and make two more on his own, proving that family is more than blood, more than what time and fate and even death dictates and he clung to that with everything he had and he came out on top for it
Hongāer may not have had the family he deserved
Wu Ming may have been abandoned by the world
Hua Cheng may pretend nothing can phase him and that he doesnāt care about anyone but his god
San Lang has a beloved in this world
And he is also the youngest third brother