Okay so I'm just putting this out there for anyone who was confused like me. I was always so scared that Lihuan had cancer (cause of the cancer rumours) and it left a lingering sadness in me (like what if it came back one day), but I did a bunch of research and I am 100% certain now that he didn't have cancer - it was just a fever/flu. In China, it's completely normal and standard practice to visit a hospital and get an IV drip for a common cold/flu and there's often a room full of people having drips, it also takes 1-3 hours depending on the drip you're having. Because this method of treating colds is almost non existent in the West, it looked like Lihuan was having chemo treatment to a lot of us. But the lady even says that 'a lot of people get sick this time of year' and Lihuan said he didn't want YuYang to know he 'felt unwell'. He'd never be able to hide cancer from YuYang trust me it changes how you look and they'd also never have let him go home early if he was having chemo (he wanted to get back home to YuYang quicker), I just wanted to clear that up in case it left anyone feeling sad or unsure