I'm not familiar with the younger actors in HSDS, so, to me the supporting cast is more interesting. Cathy Chow has upgraded from student to sifu. A very beautiful MiJue Abbess imho. I was also surprised to see Emil Chau's name in the cast list. I don't think he has acted in a TV series before. But, his part is just a cameo. The character he played is a very small character.
His acting I think is somewhat very neat. He doesn't look very attractive like the LinHu Chong from the 1995 Xiao Ao Jiang Hu version but I think perhaps he might be interesting in this new version.
He looks pretty handsome though Anyway, I think the overall casting is the most important. I saw a glance of ROCH 2016 with Michelle Chen and Chen Xiao. Chen Xiao was not bad, but not good enough to YG....Michelle Chen was not bad..but not suitable as XLN. And the two of them were lacking of chemistry. And not to mention that HR was too young and suitable enough to be YG's older sister and some other awful castings.
Hopefully we could see the trailer of Thomas Tong in the latest ROCH