You can also take bus 19 at the train station square after leaving the train station, get off at any stop such as Guo Mao Xincheng Station, and transfer to bus 530 or 126 ... This time will be longer.
I'm afraid I can't find a place. I suggest taking the BRT to the terminal and then taking a taxi to the medical school. The law and order here in Xiamen is still very good, especially in broad daylight.
In addition, after noon, the bus was empty and there were fewer passengers. It's convenient to take a bus. BRT takes up to ten minutes from the railway station to Qianpu terminal, and it takes almost twice as long by bus 19.