How to Setup NFS Server on Anolis OS 8.6?

Hi all. I can successfully setup NFS server on RHEL/CentOS 8, but the same operation is not successful on Anolis OS 8.6.

[root@master ~]# rpm -qa|egrep "nfs-utils|rpcbind"
rpcbind-1.2.5-8.0.1.an8.x86_64
nfs-utils-2.3.3-51.0.1.an8.x86_64

[root@master ~]# systemctl status nfs-server.service 
● nfs-server.service - NFS server and services
   Loaded: loaded (/usr/lib/systemd/system/nfs-server.service; enabled; vendor preset: disabled)
  Drop-In: /run/systemd/generator/nfs-server.service.d
           └─order-with-mounts.conf
   Active: active (exited) since Thu 2022-11-10 21:38:04 CST; 44min ago
  Process: 1216 ExecStart=/bin/sh -c if systemctl -q is-active gssproxy; then systemctl reload gssproxy ; fi (code=exited, status=0/SUCCE>
  Process: 1201 ExecStart=/usr/sbin/rpc.nfsd (code=exited, status=0/SUCCESS)
  Process: 1191 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)
 Main PID: 1216 (code=exited, status=0/SUCCESS)

Nov 10 21:38:04 master systemd[1]: Starting NFS server and services...
Nov 10 21:38:04 master systemd[1]: Started NFS server and services.

[root@master ~]# systemctl status nfs-utils.service 
● nfs-utils.service - NFS server and client services
   Loaded: loaded (/usr/lib/systemd/system/nfs-utils.service; static; vendor preset: disabled)
   Active: active (exited) since Thu 2022-11-10 21:44:56 CST; 38min ago
  Process: 3494 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
 Main PID: 3494 (code=exited, status=0/SUCCESS)

Nov 10 21:44:56 master systemd[1]: Starting NFS server and client services...
Nov 10 21:44:56 master systemd[1]: Started NFS server and client services.

[root@master ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)

[root@master ~]# getsebool 
getsebool:  SELinux is disabled

[root@master ~]# ifconfig ens224
ens224: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.1.1.1  netmask 255.255.0.0  broadcast 10.1.255.255
        inet6 fe80::20c:29ff:febe:108b  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:be:10:8b  txqueuelen 1000  (Ethernet)
        RX packets 470  bytes 32638 (31.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 472  bytes 33040 (32.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@master ~]# cat /etc/exports
/opt 10.1.0.0/16(rw,insecure,no_root_squash,sync)
/home 10.1.0.0/16(rw,insecure,no_root_squash,sync)

[root@master ~]# rpcinfo |grep nfs
    100003    3    tcp       0.0.0.0.8.1            nfs        superuser
    100003    4    tcp       0.0.0.0.8.1            nfs        superuser
    100227    3    tcp       0.0.0.0.8.1            nfs_acl    superuser
    100003    3    tcp6      ::.8.1                 nfs        superuser
    100003    4    tcp6      ::.8.1                 nfs        superuser
    100227    3    tcp6      ::.8.1                 nfs_acl    superuser

Get the following errors:
[root@master ~]# showmount -e master
rpc mount export: RPC: Unable to receive; errno = Connection refused

Can anyone give me some advice?

Best regards,
Yong Wu

---
Faculty of Chemistry
Northeast Normal University
Renmin Street No.5268
Changchun, Jilin 130024
P. R. China.