23,963KM-2KM=23,961KM
https://china.hket.com/article/3884311/%E5%85%A7%E5%9C%B0%E6%BC%94%E5%93%A1%E7%8E%8B%E6%98%9F%E7%8D%B2%E6%95%91%20%E8%87%AA%
為了容易對付柬埔寨緬甸人，決定傳天主教福音的好處，便是彈性！
21.860124,96.027476
https://www.hk01.com/%E5%8D%B3%E6%99%82%E4%B8%AD%E5%9C%8B/1091984/%E7%8E%8B%E6%98%9F%E8%87%AA%E8%BF%B0-%E6%89%80%E6%9C%89%E4