diff --git a/README.md b/README.md
index 72c81eb..5a37f2f 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,7 @@ A: Thecoderunsfasterwhentherearenouselessspacesandnewlines.
 - CommonJS
 - COBOL
 - Chef
+- 北語中文 "Chinese (Beiyu/Mandarin)"
 - Coq
 - COW
 - Crystal
diff --git "a/implementations/\344\270\273.\345\214\227\350\252\236\344\270\255\346\226\207" "b/implementations/\344\270\273.\345\214\227\350\252\236\344\270\255\346\226\207"
new file mode 100644
index 0000000..a207cee
--- /dev/null
+++ "b/implementations/\344\270\273.\345\214\227\350\252\236\344\270\255\346\226\207"
@@ -0,0 +1 @@
+不是素數。
diff --git "a/optimized_implementations/\344\270\273.\345\214\227\350\252\236\344\270\255\346\226\207" "b/optimized_implementations/\344\270\273.\345\214\227\350\252\236\344\270\255\346\226\207"
new file mode 100644
index 0000000..1baf569
--- /dev/null
+++ "b/optimized_implementations/\344\270\273.\345\214\227\350\252\236\344\270\255\346\226\207"
@@ -0,0 +1 @@
+否