中文域名什么时候到期

import whois
import smtplib
from email.mime.text import MIMEText

def check_domain_expiration(domain):
    w = whois.whois(domain)
    expiration_date = w.expiration_date
    if expiration_date:
        return expiration_date
    else:
        return None

def send_reminder_email(to_email, domain, expiration_date):
    msg = MIMEText(f"域名 {domain} 即将到期，到期时间为 {expiration_date}。请及时续费。")
    msg['Subject'] = '域名到期提醒'
    msg['From'] = 'your_email@example.com'
    msg['To'] = to_email

    smtp_server = 'smtp.example.com'
    smtp_port = 587
    smtp_username = 'your_email@example.com'
    smtp_password = 'your_password'

    server = smtplib.SMTP(smtp_server, smtp_port)
    server.starttls()
    server.login(smtp_username, smtp_password)
    server.sendmail(smtp_username, to_email, msg.as_string())
    server.quit()

domain = 'example.com'
expiration_date = check_domain_expiration(domain)
if expiration_date and (expiration_date - datetime.datetime.now()).days < 30:
    send_reminder_email('admin@example.com', domain, expiration_date)