Mr. Bai Juyi, an elderly man, resides in the internal medicine ward 203 at Ditan Hospital. Counting the time Zhu Shijun was hospitalized, this is Xiao Xian's second time entering a hospital, making her quite familiar with the place, although such familiarity isn't really a good thing.
On the way, Feng Xing mentioned that Zhuo Feng was also still in the hospital. Just before leaving the house, Xiao Xian saw the camellia that she rescued from Mr. Bai's undeserving nephew and thought that bringing some flowers for a hospital visit seemed appropriate, so she brought it along by some twist of fate.
Ditan Hospital is a top-tier hospital, where both the nurses and doctors have a great attitude. Hearing that Xiao Xian was there to visit a patient, they directed her where to go.