diff --git a/README_ospp.md b/README_ospp.md
new file mode 100644
index 00000000..93a32638
--- /dev/null
+++ b/README_ospp.md
@@ -0,0 +1,3 @@
+# OSPP 
+I changed the sedna source code to implement my algorithm.   
+Please turn to https://github.com/kubeedge/sedna/pull/378 and https://github.com/nailtu30/sedna/blob/ospp-final/README_ospp.md for more information.
\ No newline at end of file