diff --git a/How-to-build.md b/How-to-build.md
new file mode 100644
index 0000000..e98d1de
--- /dev/null
+++ b/How-to-build.md
@@ -0,0 +1,3 @@
+[Original udp2raw article](https://github.com/wangyu-/udp2raw/blob/master/doc/build_guide.md)
+
+the above aticle is a bit outdated, see [tinyportMapper how-to-build](https://github.com/wangyu-/tinyPortMapper/wiki/How-to-build) as well.
\ No newline at end of file