Shinhwa's Dongwan updated fans on his knee injury, which he suffered back in February of this year.
He took to his official Facebook to post a set of handwritten letters, saying, "I've taken up a pen to deliver sorry news. Last winter, I slipped on a rainy day and injured my knee. I had hoped to be healed in time for this concert, but I'm still at a stage where I have to be careful."
Dongwan continued, "Unfortunately, I will have to miss out on the choreography for a few songs during the June concert. More specifically, I've torn myposterior cruciate ligament(PCL). Currently, my condition is positive, but nothing is for certain until my re-examination."