Cure to Faye's illness

"Mr. Long, little princess's fever is not going down," Faye's nanny said in a worried voice when the little princess's body temperature didn't go down after another night. 

To Long Jie's dismay, doctors were of no help and he still couldn't reach Feng Siyan's phone. 

" What does Dr. William have to say about it?" Long Jie asked the nanny. Many top pediatricians were brought in a single day and none of them could diagnose Faye's condition. It was as if doctors hadn't heard about such illness ever. 

Yet, they were very much intrigued by this rare disease they had not heard of before. However, Long Jie outrightly refused to let Faye be their new experimental project.