if all of xie lian's luck was sealed away so that his followers could get his share of it and hua cheng was his most (and most likely only) devoted believer in those 800 years and he's got really good luck....... do you. do you understand. do you understand what im trying to say here.
Since San Lang literally has dice with teleportation arrays that can take him anywhere he wants, this has to be the first time in 800 years that he's had to actually WALK from point A to point B. Supposedly ghosts are affected by too much sunlight; that doesn't seem like it would get to Hua Cheng with his power level, yet you can't deny our boy looks miserable.
I think he's most upset that this whole trek is happening because SOMEONE doesn't have enough spiritual magic to get them right where they wanna go. He might have even been fine with an extended trip if it was just him and Xie Lian, but those other two had to butt in. No wonder moments after this he's immediately picking a fight to make himself feel better.
Sleeping in Puqi shrine? Easy, gonna win over Xie Lian in no time
Trudging across the desert for hours on end? Gege, I'm going to die again please have mercy