As already mentioned in my comment you can find a guide regarding this topic in the official blog:

In this article, we will show you how to set up and configure nginx-ingress to route applications in Kubernetes on Alibaba Cloud.

And you would be especially interested in this part:

Loadbalancer: Exposes the service externally using a cloud provider's load balancer. NodePort and ClusterIP services, to which the external load balancer will route, are automatically created.

I hope it helps.