How to divide the residential units of mountains and rivers?

Each building has its own unit number and is used to counting from east to west. The easternmost unit is 1 unit, and then add it to the west.

Shanshuirenjia was invested and built by Ren Jian Zheng Hong Real Estate Co., Ltd. in 2004. There are 9 buildings, including 554 houses. The property company in this community is Changsha Cape of Good Hope Beijing Property Management Co., Ltd. ..