You can take the "Arsenal-Haimen" bus to Haimen in Sanyu. You can ask the drivers that their buses don't pass Everbright Securities. If it passes, you can buy a ticket to go there. If not, you can take a taxi when waiting for the bus to Haimen bus station, because you don't know where Everbright Securities is.
Remember, you can take the bus from the armory to Haimen, and Sanyu Town can also take this bus. Aunt's house is more than three, and uncle's house is winter. I often take this bus.