One of the reasons why I'm watcing this series is because of Hyun Joong. I recently found an article about him on asianfanatics. Apparently, he fainted due to fatigue during their filming in Macau for episode 13 and 14.
"I was walking and I just fainted." He recieved treatment in a medical room in a hotel nearby and recovered. He said, "I haven't had much sleep since the drama started because of the schedule and I've been getting alot of pressure from acting as well." He also said "I find the energy to continue filming through the love of my fans."
I hope he's ok nowl! Can't wait to see more of him in the drama!
sources: dolce@asianfanatics, no cut news + cynews + soompi