The report alleged, "Kris was diagnosed with suspected myocarditis at the hospital." A medical certificate with Kris' Chinese name 'Wu Yi Fan' was also provided as proof. Sina stated that a medical professional commented, "I can't say that he has a heart problem, but his creatine kinase and isozyme levels are higher than average, so we can't exclude the possibility of myocarditis. In cases like this, we suggest another examination, and if the levels are still high, we suggest treatment from a specialist as well as rest."
Kris is said to have received a diagnosis of suspected myocarditis on a visit to a hospital in Guangzhou, China when he returned from the '12th Korean Musical Festival' in Los Angeles, California on May 2.
To add to the reports, a former SM Entertainment trainee and self-labeled friend of Kris named Song Byung Yang posted to Weibo about the situation. He wrote, "As a musician who spent 7 years in Korea, I can completely understand Kris' decision and the dilemma he went through. As an old friend of his, it wasn't easy seeing him struggle due to the severe mental stress and fatigue. Because his body couldn't handle it, he even developed heart problems. Everyone, support and understand Kris. I hope that you show him even more kindness now. Yi Fan, I welcome you home."
Song Byung Yang is reported by Sina to have started as a trainee at SM Entertainment in 2004 before parting ways with the agency in 2011.
Maybe this sheds some light on Kris' message to fans?