I wonder in that case what age the Zhangs get the tattoos. If it’s something given after the wilding, but when Haike and the rest got back zql was made patriarch and freed them from the memory loss. So maybe Haike and the rest were the first generation not to get one.

Sounds plausible! I have no idea how old they all are. There's a very young Zhang Qiling in the deleted scenes of The Mystic Nine, but both Qishan and Rishan are apparently from a different Zhang family branch anyway.