Well, it seems that everything has gone well, and Tian You is in the recovery room with QinQin by his side. He started surgery at 9am and it lasted at least 8 or 9 hours. The next few days are still critical, but he is in very good hands.
The surgeon successfully fixed his kidney. Basically, the tube that was draining the kidney into the bag was not implanted correctly, so it caused his urine to back up into his kidney, which would cause infections, which would then threaten his only kidney. He was already at a dangerous stage of reflux. That issue is now resolved with the surgeon re-doing (done already at previous failed surgeries) the ureter implant. This was the most difficult part of his surgery and Dr Gearhart is the foremost expert to handle this. Tian You’s long-term prognosis is now very good.
Also, the doctor gave him a full scrotum/penile reconstruction and said that it will be "nice looking" and functional, and with modern science he might even be able to have children. They also tested his nerve reflex on the back end, and there is a possibility that they one day can create an anus and get rid of the colostomy bag for that function.
So fingers crossed... Everything has been smooth so far.