GCP中定义的防火墙规则,但无法在浏览器中访问

I have followed some youtube and also stackoverflow thread to open a port in GCP. The firewall rule is defined and bind to my VM but yet it's not accessible from browser. firewall defined

Then i checked my angular app, the server also run with 'ng serve' command. angular app started

我有什么想念的吗?