From the situation I followed on Thai's Twitter, first 2 days ago, the rumor come from one account stated that she see Hong Jonghyun name in the list of flight going to Samui. She said that this is very surprising cause Nana also film her movie at Samui at that time. Then she tweet another message stated that HJH will go back to Korea on 19, while Nana will be back on 20, she also state the detail of Nana flight exactly. (I'm not sure why she know this info, but from what I observed her account, it seems like she is a flight attendant so she know the information of the passenger. Yeah, and I think reveal some information of the passenger break the rule right?). At that time, no one believe her and ignore this rumor. Some Thai's fan asked her for the detail and called her a liar, then to prove herself, she reveal the flight number of HJH. Some Jonghah Thai fan checked it and yeah we were shocking cause there's really Hong Jonghyun names on the list of passenger coming to Samui on that day but we still stay optimistic cause in Korea there are many people that name Hong Jonghyun, right?