Answer by why it doesnt work for Enable System clock synchronization

For those who followed max's answer, but failed.Go to NTP, choose your specific pool zone, and add at least two pool zones to your /etc/systemd/timesyncd.conf. For instance, for Asia, add:

[Time]NTP=0.asia.pool.ntp.org 1.asia.pool.ntp.orgFallbackNTP=0.pool.ntp.org 1.pool.ntp.org

Then run the rest of the commands in the recommended answer.