1{
 2  den.aspects.core.time-sync = {
 3    nixos = {
 4      networking.timeServers = [
 5        "ntp.aliyun.com" # Aliyun NTP server
 6        "ntp.tencent.com" # Tencent NTP server
 7        "time.cloudflare.com" # Cloudflare NTP server
 8      ];
 9    };
10  };
11}