diff --git a/module16/fission/3.functions/1.go-env.md b/module16/fission/3.functions/1.go-env.md
index b4ef9db..82b59a4 100644
--- a/module16/fission/3.functions/1.go-env.md
+++ b/module16/fission/3.functions/1.go-env.md
@@ -56,7 +56,7 @@ spec:
 - A builder pod is composed by env builder, which is to build the source, and fetcher, which is to retrieve code. The two containers share the same sharedVolume
 
 ```
-kubectl get deployment -n fission-builder go-254706 -oyaml
+kubectl get deployment go-254706 -oyaml
 ```
 ```
 apiVersion: apps/v1
diff --git a/module16/fission/3.functions/2.go-fn.md b/module16/fission/3.functions/2.go-fn.md
index f08dc6a..e3a3b07 100644
--- a/module16/fission/3.functions/2.go-fn.md
+++ b/module16/fission/3.functions/2.go-fn.md
@@ -121,8 +121,8 @@ poolmgr-go-default-254706-788858ccb8-v978z   2/2     Running   0          27s
 the code is compiled as golang plugin
 
 ```
-go build -buildmode=plugin httpserver.go
-ls -la httpserver.so
+go build -buildmode=plugin hello.go
+ls -la hello.so
 ```
 and is loaded by go server, which is defined in fission golang env repo
 
diff --git a/module16/fission/3.functions/hello.js b/module16/fission/3.functions/hello.js
new file mode 100644
index 0000000..aa94dc4
--- /dev/null
+++ b/module16/fission/3.functions/hello.js
@@ -0,0 +1,7 @@
+
+module.exports = async function(context) {
+    return {
+        status: 200,
+        body: "hello, world!\n"
+    };
+}
diff --git a/module16/fission/3.functions/hello.so b/module16/fission/3.functions/hello.so
new file mode 100644
index 0000000..65689b1
Binary files /dev/null and b/module16/fission/3.functions/hello.so differ
diff --git a/module16/knative/3.eventing/2.source-and-channel.md b/module16/knative/3.eventing/2.source-and-channel.md
index 07c68df..8ff9d2a 100644
--- a/module16/knative/3.eventing/2.source-and-channel.md
+++ b/module16/knative/3.eventing/2.source-and-channel.md
@@ -17,7 +17,7 @@ kn channel create knative-hello-channel
 ### edit pingsource and set sink to channel and let fn subscribe the event
 
 ```
-kubectl apply -f pingsource.yaml
+kubectl replace -f pingsource.yaml
 ```
 
 ### wait for ping being invoked and function pod being scaled
diff --git a/module16/knative/3.eventing/sample-app.yaml b/module16/knative/3.eventing/sample-app.yaml
index 30e61e0..ecdde3b 100644
--- a/module16/knative/3.eventing/sample-app.yaml
+++ b/module16/knative/3.eventing/sample-app.yaml
@@ -26,6 +26,23 @@ spec:
       kind: Service
       name: helloworld-go
 ---
+# Knative Eventing Trigger to trigger the helloworld-go service
+apiVersion: eventing.knative.dev/v1
+kind: Trigger
+metadata:
+  name: event-display
+spec:
+  broker: default
+  filter:
+    attributes:
+      type: dev.knative.samples.hifromknative
+      source: knative/eventing/samples/hello-world
+  subscriber:
+    ref:
+      apiVersion: v1
+      kind: Service
+      name: helloworld-go
+---
 apiVersion: serving.knative.dev/v1
 kind: Service
 metadata: