diff --git a/golang/2202/220220-CN.go b/golang/2202/220220-CN.go
new file mode 100644
index 0000000..80d4e52
--- /dev/null
+++ b/golang/2202/220220-CN.go
@@ -0,0 +1,27 @@
+package main
+
+import "fmt"
+
+func isOneBitCharacter(bits []int) bool {
+	var n = len(bits)
+	if n == 1 || bits[n-2] == 0 {
+		return true
+	}
+	// try applying codes from front to rear
+	vis := make([]bool, n)
+	vis[0] = true
+	for i := 0; i < n-2; i++ {
+		if !vis[i] {
+			continue
+		} else if bits[i] == 0 {
+			vis[1+i] = true
+		} else { // bits[i] == 1
+			vis[2+i] = true
+		}
+	}
+	return !vis[n-2]
+}
+
+func main() {
+	fmt.Println(isOneBitCharacter([]int{1, 1, 1, 0}))
+}