How does nginx have multiple ports in one domain name?

www.sifou.com:80
www.sifou.com:81
www.sifou.com:82
how to write multiple ports in one domain name?

Jun.21,2022

method one

write three listen

server {
    listen       80;
    listen       81;
    listen       82;
    server_name  www.sifou.com;
...

method two

write three server

server {
    listen       80;
    server_name  www.sifou.com;
}

server {
    listen       81;
    server_name  www.sifou.com;
}

server {
    listen       82;
    server_name  www.sifou.com;
}
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3ea0c-2c431.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3ea0c-2c431.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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