How does that count?
As we know, Chinese directions can be categorized as 六合八方, but none of them is related to the number 10?
KEY defines: 十面 as: (on) all sides, (from) all sides
Also from a Baidu Zhidao question: 十面指的东,南,西,北，东北，东南，西北，西南,上，下
Ten sides: east, south, west, north, north-east, south-east, north-west, south-west, above, below