in the subtitles Ed also mentioned she might have been Jet's love child. It also was Jet had not been there in ten years and got communication 3 days ago. If I'm understanding it right he sent the communication to Jet in the hopes to reunite with his daughter one last time to explain why he had abandoned them. Also Feng Shui is a type of geomancy, think alkaehestry from FMA: Brotherhood but used for divination. Sensing the flow of the earth's energy.