vim /etc/chrony.conf

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).

#pool 2.centos.pool.ntp.org iburst
server ntp.api.bz iburst
server ntp.aliyun.com iburst

# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift

#注释默认的时间同步服务器pool 2.centos.pool.ntp.org iburst，
#添加新的时间同步服务器server ntp.api.bz iburst server ntp.aliyun.com iburst

systemctl restart chronyd

chronyc sources -v

timedatectl status

systemctl enable chronyd