diff --git a/hello.html b/hello.html
index e92f92a..de6c2b9 100644
--- a/hello.html
+++ b/hello.html
@@ -2,6 +2,7 @@
+
Hello Team
@@ -30,6 +31,7 @@
updateText(elisabeth(), textContent);
updateText(bob(), textContent);
// Note: we need to add more function here for everyone to say hello.
+updateText(yao(), textContent);
// append the text content to the document
document.body.appendChild(textContent);
diff --git a/yao.js b/yao.js
new file mode 100644
index 0000000..ba802d4
--- /dev/null
+++ b/yao.js
@@ -0,0 +1,3 @@
+function yao() {
+ return "Yao says hello.";
+}
\ No newline at end of file